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Journal of Integrative Plant Biology

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https://www.readbyqxmd.com/read/29786952/arabidopsis-sumo-protease-asp1-positively-regulates-aba-signaling-during-early-seedling-development
#1
Qiongli Wang, Gao-Ping Qu, Xiangxiong Kong, Yan Yan, Jigang Li, Jing Bo Jin
The small ubiquitin-related modifier (SUMO) modification plays an important role in the regulation of abscisic acid (ABA) signaling, but the function of the SUMO protease, in ABA signaling, remains largely unknown. Here, we show that the SUMO protease, ASP1 positively regulates ABA signaling. Mutations in ASP1 resulted in an ABA-insensitive phenotype, during early seedling development. Wild-type ASP1 successfully rescued, whereas an ASP1 mutant (C577S), defective in SUMO protease activity, failed to rescue, the ABA-insensitive phenotype of asp1-1...
May 22, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29762900/multiplex-gene-editing-in-rice-with-simplified-crispr-cpf1-and-crispr-cas9-systems
#2
LETTER
Mugui Wang, Yanfei Mao, Yuming Lu, Zhidan Wang, Xiaoping Tao, Jian-Kang Zhu
We developed simplified single transcriptional unit (SSTU) CRISPR systems for multiplex gene editing in rice using FnCpf1, LbCpf1 or Cas9, in which the nuclease and its crRNA array are co-expressed from a single Pol II promoter, without any additional processing machinery. Our SSTU systems are easy to construct and effective in mediating multiplex genome editing.
May 15, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29752856/ethylene-induced-microtubule-reorientation-is-essential-for-fast-inhibition-of-root-elongation-in-arabidopsis
#3
Yichuan Wang, Yusi Ji, Ying Fu, Hongwei Guo
Microtubule reorientation is a long-standing observation that has been implicated in regulating the inhibitory effect of ethylene on axial elongation of plant cells. However, the signaling mechanism underlying ethylene-induced microtubule reorientation has remained elusive. Here, we reveal, by live confocal imaging and kinetic root elongation assays, that the time courses of ethylene-induced microtubule reorientation and root elongation inhibition are highly correlated, and that microtubule reorientation is required for the full responsiveness of root elongation to ethylene treatment...
May 12, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29740955/non-dormant-axillary-bud-1-regulates-axillary-bud-outgrowth-in-sorghum
#4
Jun Chen, Limin Zhang, Mengjiao Zhu, Lijie Han, Ya Lv, Yishan Liu, Pan Li, Haichun Jing, Hongwei Cai
Tillering contributes to grain yield and plant architecture and therefore is an agronomically important trait in sorghum (Sorghum bicolor). Here, we identified and functionally characterized a mutant of the Non-dormant Axillary Bud 1 (NAB1) gene from an ethyl methanesulfonate-mutagenized sorghum population. The nab1 mutants have increased tillering and reduced plant height. Map-based cloning revealed that NAB1 encodes a carotenoid-cleavage dioxygenase 7 (CCD7) orthologous to rice (Oryza sativa) HIGH-TILLERING DWARF1/DWARF17 and Arabidopsis thaliana MORE AXILLARY BRANCHING 3...
May 8, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29727062/expanding-roles-for-pectins-in-plant-development
#5
REVIEW
Adam M Saffer
Pectins are complex cell wall polysaccharides important for many aspects of plant development. Recent studies have discovered extensive physical interactions between pectins and other cell wall components, implicating pectins in new molecular functions. Pectins are often localized in spatially restricted patterns, and some of these non-uniform pectin distributions contribute to multiple aspects of plant development, including the morphogenesis of cells and organs. Furthermore, a growing number of mutants affecting cell wall composition have begun to reveal the distinct contributions of different pectins to plant development...
May 4, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29727051/receptor-like-protein-kinases-key-regulators-controlling-root-hair-development-in-arabidopsis-thaliana
#6
REVIEW
Zhuoyun Wei, Jia Li
Root hairs are tubular outgrowths specifically differentiated from epidermal cells in differentiation zone. The formation of root hairs greatly increases the surface area of a root and maximizes its ability to absorb water and inorganic nutrients essential for plant growth and development. Root hair development is strictly regulated by intracellular and intercellular signal communications. Cell surface-localized receptor-like protein kinases (RLKs) have been discovered as important components in these cellular processes...
May 4, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29727045/arabidopsis-vq10-interacts-with-wrky8-to-modulate-basal-defense-against-botrytis-cinerea
#7
Junqiu Chen, Houping Wang, Yang Li, Jinjing Pan, Yanru Hu, Diqiu Yu
Recent studies in Arabidopsis have revealed that some VQ motif-containing proteins physically interact with WRKY transcription factors; however, their specific biological functions are still poorly understood. In this study, we confirmed the interaction between VQ10 and WRKY8, and found that VQ10 and WRKY8 formed a complex in the plant cell nucleus. Yeast two-hybrid analysis showed that the middle region of WRKY8 and the VQ motif of VQ10 are critical for their interaction, and that their interaction promotes the DNA-binding activity of WRKY8...
May 4, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29704401/leaf-stage-associated-resistance-is-correlated-with-phytohormones-in-a-pathosystem-dependent-manner
#8
You-Ping Xu, Lin-Hui Lv, Ya-Jing Xu, Juan Yang, Jia-Yi Cao, Xin-Zhong Cai
It has been reported in several pathosystems that disease resistance can vary in leaves at different stages. However, how general this leaf stage-associated resistance is, and the molecular mechanism(s) underlying it, remain largely unknown. Here, we investigated the effect of leaf stage on basal resistance, effector-triggered immunity (ETI) and nonhost resistance, using eight pathosystems involving the hosts Arabidopsis thaliana, Nicotiana tabacum, and N. benthamiana and the pathogens Sclerotinia sclerotiorum, Pseudomonas syringae pv...
April 28, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29667761/plant-glycosylphosphatidylinositol-gpi-anchored-proteins-at-the-plasma-membrane-cell-wall-nexus
#9
REVIEW
Trevor H Yeats, Antony Bacic, Kim L Johnson
Approximately 1% of plant proteins are predicted to be post-translationally modified with a glycosylphosphatidylinositol (GPI) anchor that tethers the polypeptide to the outer leaflet of the plasma membrane. While the synthesis and structure of GPI anchors is largely conserved across eukaryotes, the repertoire of functional domains present in the GPI-anchored proteome has diverged substantially. In plants, this includes a large fraction of the GPI-anchored proteome being further modified with plant-specific arabinogalactan (AG) O-glycans...
April 18, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29667328/insights-into-the-regulation-of-cbf-cold-signaling-in-plants
#10
REVIEW
Jingyan Liu, Yiting Shi, Shuhua Yang
Cold temperatures, a major abiotic stress, threaten the growth and development of plants worldwide. To cope with this adverse environmental cue, plants from temperate climates have evolved an array of sophisticated mechanisms to acclimate to cold periods, increasing their ability to tolerate freezing stress. Over the last decade, significant progress has been made in determining the molecular mechanisms underpinning cold acclimation following the identification of several pivotal components, including candidates for cold sensors, protein kinases, and transcription factors...
April 18, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29667322/bhlh104-confers-tolerance-to-cadmium-stress-in-arabidopsis-thaliana
#11
Xiani Yao, Yuerong Cai, Diqiu Yu, Gang Liang
Cd is a non-essential heavy metal that is toxic to both plants and animals. Here, we reveal that the transcription factor bHLH104 positively regulates Cd tolerance in Arabidopsis thaliana. We found that Fe deficiency-responsive genes were induced by Cd treatment, and that their upregulation was suppressed in bhlh104 loss-of-function mutants but enhanced upon overexpression of bHLH104. Correspondingly, the bhlh104 mutants displayed sensitivity to Cd stress, whereas plants overexpressing bHLH104 exhibited enhanced Cd tolerance...
April 18, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29664234/characterization-of-maize-leaf-pyruvate-orthophosphate-dikinase-using-high-throughput-sequencing
#12
Yuling Zhang, Rita Giuliani, Youjun Zhang, Yang Zhang, Wagner Luiz Araujo, Baichen Wang, Peng Liu, Qi Sun, Asaph Cousins, Gerald Edwards, Alisdair Fernie, Thomas P Brutnell, Pinghua Li
In C4 photosynthesis, pyruvate orthophosphate dikinase (PPDK) catalyzes the regeneration of phosphoenolpyruvate in the carbon shuttle pathway. Although the biochemical function of PPDK in maize is well characterized, a genetic analysis of PPDK has not been reported. In this study, we utilize the maize transposable elements Mutator and Ds to generate multiple mutant alleles of PPDK. Loss-of-function mutants are seedling lethal even when plants were grown under 2% CO2 , and they show very low capacity for CO2 assimilation indicating C4 photosynthesis is essential in maize...
April 17, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29660254/phosphatidic-acid-pa-plays-key-roles-regulating-plant-development-and-stress-responses
#13
REVIEW
Hong-Yan Yao, Hong-Wei Xue
Phospholipids, including phosphatidic acid (PA), phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylglycerol (PG), phosphatidylserine (PS) and phosphoinositides, have emerged as an important class of cellular messenger molecules in various cellular and physiological processes, of which PA attracts much attentions of the researchers. In addition to its effect on stimulating the vesicle trafficking, many studies have demonstrated that PA plays a crucial role in various signaling pathways by binding target proteins and regulating their activity and subcellular localization...
April 16, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29660240/ros-signaling-and-stomatal-movement-in-plant-responses-to-drought-stress-and-pathogen-attack
#14
REVIEW
Junsheng Qi, Chun-Peng Song, Baoshan Wang, Jianmin Zhou, Jaakko Kangasjärvi, Jian-Kang Zhu, Zhizhong Gong
Stomata, the pores formed by a pair of guard cells, are the main gateways for water transpiration and photosynthetic CO2 exchange, as well as pathogen invasion in land plants. Guard cell movement is regulated by a combination of environmental factors including water status, light, CO2 levels and pathogen attack, as well as endogenous signals such as abscisic acid and apoplastic reactive oxygen species (ROS). Under abiotic and biotic stress conditions, extracellular ROS are mainly produced by plasma membrane-localized NADPH oxidases, whereas intracellular ROS are produced in multiple organelles...
April 16, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29578643/arabidopsis-thaliana-nop10-is-required-for-gametophyte-formation
#15
Lin-Xiao Li, Hong-Ze Liao, Li-Xi Jiang, Qing Tan, De Ye, Xue-Qin Zhang
The female gametophyte is crucial for sexual reproduction of higher plants, yet little is known about the molecular mechanisms underlying its development. Here, we report that Arabidopsis thaliana NOP10 (AtNOP10) is required for female gametophyte formation. AtNOP10 was expressed predominantly in the seedling and reproductive tissues, including anthers, pollen grains, and ovules. Mutations in AtNOP10 interrupted mitosis of the functional megaspore during early development and prevented polar nuclear fusion in the embryo sacs...
March 26, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29578639/hormone-modulation-of-legume-rhizobial-symbiosis
#16
REVIEW
Huan Liu, Chi Zhang, Jun Yang, Nan Yu, Ertao Wang
Leguminous plants can establish symbiotic associations with diazotropic rhizobia to form nitrogen-fixating nodules, which are classified as determinate or indeterminate based on the persistence of nodule meristem. The formation of nitrogen-fixing nodules requires coordinating rhizobial infection and root nodule organogenesis. The formation of infection thread and the extent of nodule formation are largely under plant control but vary with environmental conditions and the physiological state of the host plants...
March 26, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29575650/efficient-allelic-replacement-in-rice-by-gene-editing-a-case-study-of-the-nrt1-1b-gene
#17
LETTER
Jingying Li, Xin Zhang, Yongwei Sun, Jiahui Zhang, Wenming Du, Xiuping Guo, Shaoya Li, Yunde Zhao, Lanqin Xia
Precise replacement of an existing allele in commercial cultivars with an elite allele is a major goal in crop breeding. A single nucleotide polymorphism in NRT1.1B gene between japonica and indica rice is responsible for the improved nitrogen use efficiency in indica rice. Herein, we precisely replaced the japonica NRT1.1B allele with the indica allele in just one generation using CRISPR/Cas9 gene editing technology. No additional selective pressure was needed to enrich the precise replacement events. This work demonstrates the feasibility of replacing any genes with elite alleles within one generation, greatly expanding our ability to improve agriculturally important traits...
March 25, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29575603/the-arabidopsis-catalase-triple-mutant-reveals-important-roles-of-catalases-and-peroxisome-derived-signaling-in-plant-development
#18
Tong Su, Pingping Wang, Huijuan Li, Yiwu Zhao, Yao Lu, Peng Dai, Tianqi Ren, Xiaofeng Wang, Xuezhi Li, Qun Shao, Dazhong Zhao, Yanxiu Zhao, Changle Ma
Hydrogen peroxide (H2 O2 ) is generated in many metabolic processes. As a signaling molecule, H2 O2 plays important roles in plant growth and development, as well as environmental stress response. In Arabidopsis, there are three catalase genes,CAT1, CAT2, and CAT3. The encoded catalases are predominately peroxisomal proteins and are critical for scavenging H2 O2 . Since CAT1 and CAT3 are linked on chromosome 1, it has been almost impossible to generate cat1/3 and cat1/2/3 mutants by traditional genetic tools...
March 25, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29575545/two-soybean-bhlh-factors-regulate-response-to-iron-deficiency
#19
Lin Li, Wenwen Gao, Qi Peng, Bin Zhou, Qihui Kong, Yinghui Ying, Huixia Shou
Iron is an indispensable micronutrient for plant growth and development. Limited bioavailability of Fe in the soil leads to iron deficiency chlorosis in plants and yield loss. In this study, two soybean basic helix-loop-helix transcription factors, GmbHLH57 and GmbHLH300, were identified in response to Fe-deficiency. Both transcription factors are expressed in roots and nodules, and are induced by Fe deficiency; these patterns were confirmed in transgenic hairy roots expressing constructs of the endogenous promoters fused to a GUS reporter gene...
March 25, 2018: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29573168/plant-g-proteins-interact-with-er-luminal-protein-receptors-to-regulate-er-retrieval
#20
Shanshan Wang, Ke Xie, Guoyong Xu, Huarui Zhou, Qiang Guo, Jingyi Wu, Zengwei Liao, Na Liu, Yan Wang, Yule Liu
Maintaining endoplasmic reticulum (ER) homeostasis is essential for the production of biomolecules. ER retrieval, i.e., the retrograde transport of compounds from the Golgi to the ER, is one of the pathways that ensures ER homeostasis. However, the mechanisms underlying the regulation of ER retrieval in plants remain largely unknown. Plant ERD2-like proteins (ERD2s) were recently suggested to function as ER luminal protein receptors that mediate ER retrieval. Here, we demonstrate that heterotrimeric G protein signaling is involved in ERD2-mediated ER retrieval...
March 23, 2018: Journal of Integrative Plant Biology
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