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Journal of Integrative Plant Biology

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https://www.readbyqxmd.com/read/29131514/quantitative-trait-loci-associated-with-soybean-seed-weight-and-composition-under-different-phosphorus-levels
#1
Gokhan Hacisalihoglu, Amy L Burton, Jeffery L Gustin, Selim Eker, Safiye Asikli, Elif Hakli Heybet, Levent Ozturk, Ismail Cakmak, Atilla Yazici, Kent O Burkey, James Orf, A Mark Settles
Seed size and composition are important traits in food crops and can be affected by nutrient availability in the soil. Phosphorus (P) is a non-renewable, essential macronutrient, and P deficiency limits soybean (Glycine max) yield and quality. To investigate the associations of seed traits in low- and high-P environments, soybean recombinant inbred lines (RILs) from the cross of cultivars Fiskeby III and Mandarin (Ottawa) were grown under contrasting P availability environments. Traits including individual seed weight, seed number, and intact mature pod weight were significantly affected by soil P levels and showed transgressive segregation among the RILs...
November 13, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29087617/nicotiana-attenuata-s-capacity-to-interact-with-arbuscular-mycorrhiza-alters-its-competitive-ability-and-elicits-major-changes-in-the-leaf-transcriptome
#2
Ming Wang, Julia Wilde, Ian T Baldwin, Karin Groten
To study the local and systemic effects of arbuscular mycorrhizal fungal (AMF) colonization, Nicotiana attenuata plants impaired in their interactions with AMF due to silencing of a calcium- and calmodulin dependent protein kinase (inverted repreat (ir)CCaMK) were grown competitively in pairs with empty vector (EV) plants, with and without two different types of inoculum. When inoculated, EV plants strongly outperformed irCCaMK plants. Foliar transcript profiling revealed that AMF colonization significantly changed gene expression of P-starvation and -transporter genes in irCCaMK plants...
October 31, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29058786/jasmonate-signaling-makes-flowers-attractive-to-pollinators-and-repellant-to-florivores-in-nature
#3
LETTER
Ran Li, Meredith C Schuman, Yang Wang, Lucas Cortés Llorca, Julia Bing, Anne Bennion, Rayko Halitschke, Ian T Baldwin
Flowers are required for the Darwinian fitness of flowering plants, but flowers' advertisements for pollination services can attract florivores. Previous glasshouse work with Nicotiana attenuata revealed the role of jasmonate (JA) signaling in flower development, advertisement and defense. However, whether JA signaling mediates flowers' filtering of floral visitors in nature remained unknown. This field study revealed that silencing JA signaling resulted in flowers that produce less nectar and benzyl acetone, two pollinator-attractive traits...
October 23, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29052969/long-distance-aba-transport-can-mediate-distal-tissue-responses-by-affecting-local-aba-concentrations
#4
Wenrao Li, Carlos de Ollas, Ian C Dodd
Environmental stresses that perturb plant water relations influence abscisic acid (ABA) concentrations, but it is unclear whether long-distance ABA transport contributes to changes in local ABA levels. To determine the physiological relevance of ABA transport, we made reciprocal- and self-grafts of ABA-deficient flacca mutant and wild-type (WT) tomato plants, in which low phosphorus (P) conditions decreased ABA concentrations while salinity increased ABA concentrations. Whereas foliar ABA concentrations in the WT scions were rootstock independent under normal conditions, salinity resulted in long-distance transport of ABA: flacca scions had approximately twice as much ABA when grafted on WT rootstocks compared to flacca rootstocks...
October 20, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29052958/whole-genome-re-sequencing-reveals-evolutionary-patterns-of-sacred-lotus-nelumbo-nucifera
#5
Longyu Huang, Mei Yang, Ling Li, Hui Li, Dong Yang, Tao Shi, Pingfang Yang
Sacred lotus (Nelumbo nucifera or lotus) is an important aquatic plant in horticulture and ecosystem. As a foundation for exploring genomic variationand evolution among different germplasms, we re-sequenced 19 individuals from three cultivated temperate lotus subgroups (rhizome lotus, seed lotus and flower lotus),one wild temperate lotus subgroup (wild lotus), one tropical lotus group (Thai lotus) and outgroup (Nelumbo lutea). Through genetic diversity and polymorphism analysis by non-missing SNP sites widely distributed in the whole genome, weconfirmed that wild lotus and Thai lotus exhibited greater differentiation with a higher genomic diversity compared to cultivated lotus...
October 20, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29045007/chromatin-remodeling-factor-osino80-is-involved-in-regulation-of-gibberellin-biosynthesis-and-is-crucial-for-rice-plant-growth-and-development
#6
Chao Li, Yuhao Liu, Wen-Hui Sun, Yu Yu, Aiwu Dong
The phytohormone gibberellin (GA) plays essential roles in plant growth and development. Here, we report that OsINO80, a conserved ATP-dependent chromatin-remodeling factor in rice (Oryza sativa), functions in diverse biological processes and GA biosynthesis. OsINO80-knockdown mutants, derived from either T-DNA insertion or RNA interference, display typical GA-deficient phenotypes, including dwarfism, reduced cell length, late flowering, retarded seed germination and impaired reproductive development. Consistently, transcriptome analyses reveal that OsINO80 knockdown results in down-regulation by more than two-fold of over 1000 genes, including the GA biosynthesis genes CPS1 and GA3ox2, and the dwarf phenotype of OsINO80-knockdown mutants can be rescued by the application of exogenous GA3...
October 17, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29045000/characterization-of-the-soybean-gmalmt-family-genes-and-the-function-of-gmalmt5-in-response-to-phosphate-starvation
#7
Wenting Peng, Weiwei Wu, Junchu Peng, Jiaojiao Li, Yan Lin, Yanan Wang, Jiang Tian, Lili Sun, Cuiyue Liang, Hong Liao
A potential mechanism to enhance utilization of sparingly soluble forms of phosphorus (P) is the root secretion of malate, which is mainly mediated by the ALMT gene family in plants. In this study, a total of 34 GmALMT genes were identified in the soybean genome. Expression patterns diverged considerably among GmALMTs in response to phosphate (Pi) starvation in leaves, roots and flowers, with expression altered by P availability in 26 of the 34 GmALMTs. One root-specific GmALMT whose expression was significantly enhanced by Pi-starvation, GmALMT5, was studied in more detail to determine its possible role in soybean P nutrition...
October 17, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28981206/defective-kernel-6-encodes-a-ppr-protein-required-for-seed-development-in-maize
#8
Xiaojie Li, Wei Gu, Silong Sun, Zongliang Chen, Jing Chen, Weibin Song, Haiming Zhao, Jinsheng Lai
RNA editing is a posttranscriptional process that is important in mitochondria and plastids of higher plants. All RNA editing specific trans-factors reported so far belong to PLS-class of pentatricopeptide repeat (PPR) proteins. Here, we report the map-based cloning and molecular characterization of a defective kernel mutant dek6 in maize. Loss of Dek6 function leads to delayed embryogenesis and endosperm development, reduced kernel size, and seedling lethality. Dek6 encodes an E sub-class PPR protein that targets to both mitochondria and chloroplasts, and is involved in RNA editing in mitochondrial NADH dehydrogenase3 (nad3) at nad3-247 and nad3-275...
October 5, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28976623/establishment-and-evaluation-of-a-peanut-association-panel-and-analysis-of-key-nutritional-traits
#9
Xiurong Zhang, Suqing Zhu, Kun Zhang, Yongshan Wan, Fengzhen Liu, Qingfang Sun, Yingjie Li
Breeding programs aim to improve the yield and quality of peanut (Arachis hypogaea L.); using association mapping to identify genetic markers linked to these quantitative traits could facilitate selection efficiency. Here, we established a peanut association panel consisting of 268 lines with extensive phenotypic and genetic variation, meeting the requirements for association analysis. We grew these lines over three years and examined key agronomic traits, including protein and oil content. Population structure (Q) analysis showed two subpopulations and clustering analysis was consistent with Q-based membership assignment and closely related to botanical type...
October 4, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28895654/graft-accelerated-virus-induced-gene-silencing-facilitates-functional-genomics-in-rose-flowers
#10
Huijun Yan, Shaochuan Shi, Nan Ma, Xiaoqian Cao, Hao Zhang, Xianqin Qiu, Qigang Wang, Hongying Jian, Ningning Zhou, Zhao Zhang, Kaixue Tang
Rose has emerged as a model ornamental plant for studies of flower development, senescence, and morphology, as well as the metabolism of floral fragrances and colors. Virus-induced gene silencing (VIGS) has long since been used in functional genomics studies of rose by vacuum infiltration of cuttings or seedlings with an Agrobacterium suspension carrying TRV-derived vectors. However, VIGS in rose flowers remains a challenge because of its low efficiency and long time to silencing. Here we present a novel and rapid VIGS method that can be used to analyze gene function in rose, called 'graft-accelerated VIGS', where axillary sprouts are cut off the rose plant and vacuum infiltrated with Agrobacterium...
September 12, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28880427/stigmatic-exudate-in-the-annonaceae-pollinator-reward-pollen-germination-medium-or-extragynoecial-compitum
#11
Jenny Y Y Lau, Chun-Chiu Pang, Lawrence Ramsden, Richard M K Saunders
Although 'dry-type' stigmas are widely regarded as ancestral in angiosperms, the early-divergent family Annonaceae has copious stigmatic exudate. We evaluate three putative functions for this exudate: as a nutritive reward for pollinators; as a pollen germination medium; and as an extragynoecial compitum that enables pollen tube growth between carpels. Stigmatic exudate is fructose dominated (72.2%), but with high levels of glucose and sucrose; the dominance of hexose sugars and the diversity of amino acids observed, including many that are essential for insects, supports a nutritive role for pollinators...
September 6, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28875589/genetic-dissection-of-top-three-leaf-traits-in-rice-using-progenies-from-one-japonica%C3%A3-indica-cross
#12
Changbin Yin, Huihui Li, Zhigang Zhao, Zhiquan Wang, Shijia Liu, Liangming Chen, Xi Liu, Yunlu Tian, Juan Ma, Lidong Xu, Dashuang Zhang, Susong Zhu, Danting Li, Jianmin Wan, Jiankang Wang
The size of the top three leaves of rice plants is strongly associated with yield; thus, it is important to consider quantitative traits representing leaf size (e.g., length and width) when breeding novel rice varieties. It is challenging to measure such traits on a large scale in the field, and little is known about the genetic factors that determine the size of the top three leaves. In this study, a population of recombinant inbred lines (RILs) and reciprocal single chromosomal segment substitution lines (SSSLs) derived from the progeny of a japonica Asominori × indica IR24 cross were grown under four diverse environmental conditions...
September 6, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28875539/ago18b-negatively-regulates-determinacy-of-spikelet-meristems-on-the-tassel-central-spike-in-maize
#13
Wei Sun, Xiaoli Xiang, Lihong Zhai, Dan Zhang, Zheng Cao, Lei Liu, Zuxin Zhang
The maize tassel represents an indeterminate male inflorescence. The number of primordia that a given inflorescence meristem produces is related to its determinacy, i.e., capacity for continued meristem activity. Transcription factors (TFs) controlling determinacy in tassel axillary meristems are well studied in maize, and small RNAs are known to influence tassel development by repressing targets including tassel-related TFs. As core components of the RNA-inducible silence complex (RISC), Argonaute (AGO) proteins are required for small RNA-mediated repression...
September 6, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28708312/arabidopsis-cpr5-regulates-ethylene-signaling-via-molecular-association-with-the-etr1-receptor
#14
Feifei Wang, Lijuan Wang, Longfei Qiao, Jiacai Chen, Maria Belen Pappa, Haixia Pei, Tao Zhang, Caren Chang, Chun-Hai Dong
The plant hormone ethylene plays various functions in plant growth, development and response to environmental stress. Ethylene is perceived by membrane-bound ethylene receptors, and among the homologous receptors in Arabidopsis, the ETR1 ethylene receptor plays a major role. The present study provides evidence demonstrating that Arabidopsis CPR5 functions as a novel ETR1 receptor-interacting protein in regulating ethylene response and signaling. Yeast split ubiquitin assays and bi-fluorescence complementation studies in plant cells indicated that CPR5 directly interacts with the ETR1 receptor...
November 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28843032/regulatory-network-and-genetic-interactions-established-by-osmads34-in-rice-inflorescence-and-spikelet-morphogenesis
#15
Qingcai Meng, Xiaofeng Li, Wanwan Zhu, Li Yang, Wanqi Liang, Ludovico Dreni, Dabing Zhang
Grasses display highly diversified inflorescence architectures that differ in the arrangement of spikelets and flowers and determine cereal yields. However, the molecular basis underlying grass inflorescence morphogenesis remains largely unknown. Here we investigate the role of a functionally diversified SEPALLATA MADS-box transcription factor, OsMADS34, in regulating rice (Oryza sativa L.) inflorescence and spikelet development. Microarray analysis showed that, at the very early stages of inflorescence formation, dysfunction of OsMADS34 caused altered expression of 379 genes that are associated with protein modification and degradation, transcriptional regulation, signaling and metabolism activity...
September 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28776932/snail1-is-essential-for-female-gametogenesis-in-arabidopsis-thaliana
#16
Lihong Hao, Xiaolin Wei, Jiulei Zhu, Jiao Shi, Jingjing Liu, Hongya Gu, Tomohiko Tsuge, Li-Jia Qu
Two yeast Brix family members Ssf1 and Ssf2, involved in large ribosomal subunit synthesis, are essential for yeast cell viability and mating efficiency. Their putative homologs exist in the Arabidopsis genome; however, their role in plant development is unknown. Here, we show that Arabidopsis thaliana SNAIL1 (AtSNAIL1), a protein sharing high sequence identity with yeast Ssf1 and Ssf2, is critical to mitosis progression of female gametophyte development. The snail1 homozygous mutant was nonviable and its heterozygous mutant was semi-sterile with shorter siliques...
September 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28631407/zygote-arrest-3-that-encodes-the-trna-ligase-is-essential-for-zygote-division-in-arabidopsis
#17
Ke-Jin Yang, Lei Guo, Xiu-Li Hou, Hua-Qin Gong, Chun-Ming Liu
In sexual organisms, division of the zygote initiates a new life cycle. Although several genes involved in zygote division are known in plants, how the zygote is activated to start embryogenesis has remained elusive. Here, we showed that a mutation in ZYGOTE-ARREST 3 (ZYG3) in Arabidopsis led to a tight zygote-lethal phenotype. Map-based cloning revealed that ZYG3 encodes the transfer RNA (tRNA) ligase AtRNL, which is a single-copy gene in the Arabidopsis genome. Expression analyses showed that AtRNL is expressed throughout zygotic embryogenesis, and in meristematic tissues...
September 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28843024/namyb8-regulates-distinct-optimally-distributed-herbivore-defense-traits
#18
LETTER
Martin Schäfer, Christoph Brütting, Shuqing Xu, Zhihao Ling, Anke Steppuhn, Ian T Baldwin, Meredith C Schuman
When herbivores attack, plants specifically reconfigure their metabolism. Herbivory on the wild tobacco Nicotiana attenuata strongly induces the R2/R3 MYB transcriptional activator MYB8, which was reported to specifically regulate the accumulation of phenolamides (PAs). We discovered that transcriptional regulation of trypsin protease inhibitors (TPIs) and a threonine deaminase (TD) also depend on MYB8 expression. Induced distributions of PAs, TD and TPIs all meet predictions of optimal defense theory: their leaf concentrations increase with the fitness value and the probability of attack of the tissue...
August 26, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28836349/variation-in-floral-characters-particularly-floral-scent-in-sapromyophilous-stemona-species
#19
Gao Chen, Wei-Chang Gong, Jia Ge, Johann Schinnerl, Bin Wang, Wei-Bang Sun
Flowers or inflorescences often deploy various signals, including visual, olfactory, and gustatory cues, that can be detected by their pollinators. In many plants, these cues and their functions are poorly understood. Deciphering the interactions between floral cues and pollinators is crucial for analyzing the reproductive success of flowering plants. In this study, we examined the composition of the fetid floral scents produced by several Stemona species, including nine S. tuberosa populations from across China, using dynamic headspace adsorption, gas chromatography, and mass spectrometry techniques...
August 24, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28834357/fitness-consequences-of-a-clock-pollinator-filter-in-nicotiana-attenuata-flowers-in-nature
#20
LETTER
Felipe Yon, Danny Kessler, Youngsung Joo, Sang-Gyu Kim, Ian T Baldwin
Nicotiana attenuata flowers, diurnally open, emit scents and move vertically to interact with nocturnal hawkmoth and day-active hummingbird pollinators. To examine the fitness consequences of these floral rhythms, we conducted pollination trials in the plant's native habitat with phase-shifted flowers of plants silenced in circadian clock genes. The results revealed that some pollination benefits observed under glasshouse conditions were not reproduced under natural field conditions. Floral arrhythmicity increased pollination success by hummingbirds, while reducing those by hawkmoths in the field...
August 19, 2017: Journal of Integrative Plant Biology
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