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Nannan Song, Zhilan Xu, Jing Wang, Qianqian Qin, Haiyang Jiang, Weina Si, Xiaoyu Li
The CONSTANS-LIKE (COL) gene has an important role both in regulation flowering through photoperiodic control and response to abiotic stress. In the present study, we performed a genome-wide analysis of maize COL gene family and identified 19 non-redundant ZmCOL genes, which were unequally distributed on ten maize chromosomes. Analysis of compound phylogenetic tree (maize, sorghum, rice and Arabidopsis) showed high bootstrap, as well as conserved domain and semblable gene structures among members within the same clade, revealing that COL genes in same clade were from the common ancestral and prior to the divergence of monocots and dicots lineages...
June 13, 2018: Gene
Chuanlin Zheng, Atiako Kwame Acheampong, Zhaowan Shi, Amichay Mugzech, Tamar Halaly-Basha, Felix Shaya, Yufei Sun, Violeta Colova, Assaf Mosquna, Ron Ophir, David W Galbraith, Etti Or
The molecular mechanism regulating dormancy release in grapevine buds is as yet unclear. It was formerly proposed that dormancy is maintained by ABA-mediated repression of bud-meristem activity, and that removal of this repression triggers dormancy release. It was also proposed that such removal of repression may be achieved via natural or artificial upregulation of VvA8H-CYP707A4, which encodes ABA 8'-hydroxylase, and is the most highly expressed paralog in grapevine buds. The current study further examines these assumptions, and its experiments reveal that (1) hypoxia and ethylene, stimuli of bud dormancy release, enhance expression of VvA8H-CYP707A4 within grape buds, (2) the VvA8H-CYP707A4 protein accumulates during the natural transition to the dormancy release stage, and (3) transgenic vines overexpressing VvA8H-CYP707A4 exhibit increased ABA catabolism, significant enhancement of bud-break in controlled and natural environments and longer basal summer laterals...
June 15, 2018: Plant, Cell & Environment
Zhou Li, Yaping Li, Yan Zhang, Bizhen Cheng, Yan Peng, Xinquan Zhang, Xiao Ma, Linkai Huang, Yanhong Yan
Endogenous hormones and polyamines (PAs) could interact to regulate growth and tolerance to water stress in white clover. The objective of this study was to investigate whether the alteration of endogenous indole-3-acetic acid (IAA) level affected other hormones level and PAs metabolism contributing to the regulation of tolerance to water stress in white clover. Plants were pretreated with IAA or L-2-aminooxy-3-phenylpropionic acid (L-AOPP, the inhibitor of IAA biosynthesis) for 3 days and then subjected to water-sufficient condition and water stress induced by 15% polyethylene glycol 6000 for 8 days in growth chambers...
June 9, 2018: Plant Physiology and Biochemistry: PPB
Yi Shi, Xinju Liu, Yuanyuan Fang, Qing Tian, Hanyu Jiang, Huiling Ma
Brown patch, caused by Rhizoctonia solani, is a serious disease in Agrostis stolonifera. 2, 3-butanediol (2, 3-BD) is the major component of volatile organic compounds and was found to initiate induced systemic resistance (ISR). To investigate the induced resistance mechanism of 2, 3-BD, we examined the effects of resistance by area affected, along with changes in the content of phytohormones (Zeatin (ZT), Abscisic Acid (ABA) and Indole-3-Acetic Acid (IAA)), the activities of three phenylpropanoid metabolic enzymes (Phenylalaninammo-Nialyase (PAL), Chalcone Isomerase (CHI) and 4-Coumarate:Coenzyme A Ligase (4CL)) and the level of secondary metabolites (total phenols, flavonoid and lignin)...
June 12, 2018: Plant Physiology and Biochemistry: PPB
Giuseppe Puglia, Angelino Carta, Roberta Bizzoca, Peter Toorop, Giovanni Spampinato, Salvatore Antonino Raccuia
Seed germination responsiveness to environmental cues is crucial for plant species living in changeable habitats and it can vary among populations within the same species as a result of adaptation or modulation to local climates. Here, we investigated the germination response to environmental cues of Sisymbrella dentata (L.) O.E. Schulz, an annual endemic to Sicily living in Mediterranean Temporary Ponds (MTP), a vulnerable ecosystem. Germination of the only two known populations, Gurrida and Pantano, was assessed over a broad range of conditions to understand the role of temperatures, nitrate, hormones (ABA and GA) and after-ripening in dormancy release in this species...
June 15, 2018: Plant Biology
Christopher McCulloh, Andrew Nordin, Lindsay J Talbot, Junxin Shi, Renata Fabia, Rajan K Thakkar
Accurate measurement of total body surface area (TBSA) burned is a key factor in the care of pediatric patients with burn, especially those with large thermal injuries. There is a paucity of data on the accuracy of these measurements by prehospital, nonburn center, and emergency department (ED) providers, which can have drastic implications for patient management and outcomes. We sought to determine the accuracy of these estimates for large pediatric burns. A retrospective chart review was conducted of patients with TBSA ≥10% admitted to an American Burn Association (ABA)-verified pediatric burn center from 2007 to 2015...
June 13, 2018: Journal of Burn Care & Research: Official Publication of the American Burn Association
Jianhua Xiang, Xiaoyun Zhou, Xianwen Zhang, Ailing Liu, Yanci Xiang, Mingli Yan, Yan Peng, Xinbo Chen
Potassium (K+ ) is one of the essential macronutrients required for plant growth and development, and the maintenance of cellular K+ homeostasis is important for plants to adapt to abiotic stresses and growth. However, the mechanism involved has not been understood clearly. In this study, we demonstrated that AtUNC-93 plays a crucial role in this process under the control of abscisic acid (ABA). AtUNC-93 was localized to the plasma membrane and mainly expressed in the vascular tissues in Arabidopsis thaliana ...
2018: Frontiers in Plant Science
Shi-Jian Song, Qiang-Nan Feng, Chunlong Li, En Li, Qi Liu, Hui Kang, Wei Zhang, Yan Zhang, Sha Li
Stomatal movement, critical for photobiosynthesis, respiration, and stress responses, is regulated by many factors, among which abscisic acid (ABA) is critical. Early events of ABA signaling involve Ca2+ influx and an increase of cytoplasmic calcium ([Ca2+]cyt). Positive regulators of this process have been extensively studied, whereas negative regulators are obscure. ABA-induced stomatal closure involves K+ flux and vacuolar convolution. How these processes are connected with Ca2+ is not fully understood. We report that pat10-1, a null mutant of Arabidopsis (Arabidopsis thaliana) PROTEIN S-ACYL TRANSFERASE10 (PAT10), is hypersensitive to ABA-induced stomatal closure and vacuolar convolution...
June 13, 2018: Plant Physiology
Yang Zhao, Zhengjing Zhang, Jinghui Gao, Pengcheng Wang, Tao Hu, Zegang Wang, Yueh-Ju Hou, Yizhen Wan, Wenshan Liu, Shaojun Xie, Tianjiao Lu, Liang Xue, Yajie Liu, Alberto P Macho, W Andy Tao, Ray A Bressan, Jian-Kang Zhu
Abscisic acid (ABA) is an important phytohormone controlling responses to abiotic stresses and is sensed by proteins from the PYR/PYL/RCAR family. To explore the genetic contribution of PYLs toward ABA-dependent and ABA-independent processes, we generated and characterized high-order Arabidopsis mutants with mutations in the PYL family. We obtained a pyl quattuordecuple mutant and found that it was severely impaired in growth and failed to produce seeds. Thus, we carried out a detailed characterization of a pyl duodecuple mutant, pyr1pyl1/2/3/4/5/7/8/9/10/11/12...
June 12, 2018: Cell Reports
Satinder Kour, Vikramjit K Zhawar
Post-germination desiccation tolerance (DT) was studied in two wheat cultivars. Effect of pretreatment of abscisic acid (ABA)/ osmotic/ salt/ heat stress was also studied. One day (d)-old seedlings of wheat cultivars PBW 644 (drought tolerant) and PBW 343 (drought susceptible) were exposed to ABA/stress treatment for next 1 d, desiccated for 4 d and subsequently rehydrated for 4 d. Biomass, protein, water, protein carbonyls (oxidative toxicity) and nitric oxide (NO) levels were measured in 2 d (treated), 6 d (desiccated), 10 d (rehydrated) seedlings...
April 2018: Anais da Academia Brasileira de Ciências
Thais Cremon, Daiane M Dresch, Silvana P Q Scalon, Tathiana E Masetto
The intense environmental degradation in tropical regions suitable for agriculture has decreased native forest populations of plants with important fruits and medicinal properties. Alibertia edulis is a native tree from the Brazilian Cerrado. Knowledge about the effects of drying and storage on the physiological behavior of its seeds may aid in its sustainable exploitation and conservation. The goal of the present study was to determine which fruit ripening stage results in A. edulis seeds with higher tolerance to desiccation, and to investigate the effectiveness of polyethylene glycol (PEG) induced osmotic stress in combination with abscisic acid (ABA) in increasing seed desiccation tolerance during storage...
April 2018: Anais da Academia Brasileira de Ciências
He Zhang, Hao Kang, Chulian Su, Yanxiang Qi, Xiaomei Liu, Jinji Pu
The NAC transcription factors involved plant development and response to various stress stimuli. However, little information is available concerning the NAC family in the woodland strawberry. Herein, 37 NAC genes were identified from the woodland strawberry genome and were classified into 13 groups based on phylogenetic analysis. And further analyses of gene structure and conserved motifs showed closer relationship of them in every subgroup. Quantitative real-time PCR evaluation different tissues revealed distinct spatial expression profiles of the FvNAC genes...
2018: PloS One
Silvia Pressel, Karen S Renzaglia, Richard S Dicky Clymo, Jeffrey G Duckett
Backgrounds and Aims: Because stomata in bryophytes occur on sporangia, they are subject to different developmental and evolutionary constraints from those on leaves of tracheophytes. No conclusive experimental evidence exists on the responses of hornwort stomata to exogenous stimulation. Methods : Responses of hornwort stomata to abscisic acid (ABA), desiccation, darkness and plasmolysis were compared with those in tracheophyte leaves. Potassium ion concentrations in the guard cells and adjacent cells were analysed by X-ray microanalysis, and the ontogeny of the sporophytic intercellular spaces was compared with those of tracheophytes by cryo-scanning electron microscopy...
April 20, 2018: Annals of Botany
Sayo A Akinwumi, Temidayo V Omotosho, Mojisola R Usikalu, Oluwole A Odetunmibi, Oluwafunmilayo O Ometan, Mustapha O Adewusi
In this data article, analysis of surface water vapour density in Southeast, Nigeria were reported. The meteorological data were obtained for the period of 39 years between 1973 and 2012 from National Oceanic and Atmospheric Administration (NOAA) Climatology Centre. Five stations considered in the research area includes: Enugu, Onitsha, Abakaliki, Aba and Ihiala. Descriptive statistics were used to show an increase in monthly variation of surface water vapour density (SWVD) minimum value of about 7.15 g/m3 at Enugu in January to maximum value of about 21...
June 2018: Data in Brief
Yong Zhou, Lifang Hu, Lunwei Jiang, Shiqiang Liu
YTH domain-containing RNA-binding proteins are involved in post-transcriptional regulation and play important roles in the growth and development as well as abiotic stress responses of plants. However, YTH genes have not been previously studied in cucumber (Cucumis sativus). In this study, a total of five YTH genes (CsYTH1-CsYTH5) were identified in cucumber, which could be mapped on three out of the seven cucumber chromosomes. All CsYTH proteins had highly conserved C-terminal YTH domains, and two of them (CsYTH1 and CsYTH4) harbored extra CCCH and P/Q/N-rich domains...
June 2018: Genes & Genomics
Sang-Hoon Kim, Og-Geum Woo, Hyunsoo Jang, Jae-Hoon Lee
Cullin-RING E3 ubiquitin ligase (CRL) complex is known as the largest family of E3 ligases. The most widely characterized CRL, SCF complex (CRL1), utilizes CUL1 as a scaffold protein to assemble the complex components. To better understand CRL1-mediated cellular processes in rice, three CUL1 genes (OsCUL1s) were isolated in Oryza sativa. Although all OsCUL1 proteins exhibited high levels of amino acid similarities with each other, OsCUL1-3 had a somewhat distinct structure from OsCUL1-1 and OsCUL1-2. Basal expression levels of OsCUL1-3 were much lower than those of OsCUL1-1 and OsCUL1-2 in all selected samples, showing that OsCUL1-1 and OsCUL1-2 play predominant roles relative to OsCUL1-3 in rice...
March 2018: Genes & Genomics
Elizabeth K K Glennon, Dewi Megawati, Brandi K Torrevillas, Isaac Ssewanyana, Liusheng Huang, Fran Aweeka, Bryan Greenhouse, L Garry Adams, Shirley Luckhart
Abscisic acid (ABA) is an ancient stress hormone and is detectable in a wide variety of organisms where it regulates innate immunity and inflammation. Previously, we showed that oral supplementation with ABA decreased parasitemia in a mouse model of malaria, decreased liver and spleen pathology and reduced parasite transmission to mosquitoes. Here, we report that higher circulating ABA levels were associated with a reduced risk of symptomatic malaria in a cohort of Plasmodium falciparum-infected Ugandan children...
June 11, 2018: Scientific Reports
Li Aihua, Jiang Shunyuan, Yang Guang, Li Ying, Guo Na, Chen Tong, Kang Liping, Huang Luqi
BACKGROUND: Notopterygium incisum is an important Chinese medicinal plant. Its mature seeds have underdeveloped embryos and are physiological dormant. We found the seeds with full developed embryos can germinate after treated by fluridone (FL), an inhibitor of abscisic acid (ABA). In order to understand the molecular mechanisms underlying seed dormancy release by FL, we compared the transcriptomic changes in dormancy release induced by two different methods, FL and cold stratification (CS) in N...
June 11, 2018: BMC Plant Biology
Shuangming Li, Yong Yang, Qiang Zhang, Ningfang Liu, Qingguo Xu, Longxing Hu
Low temperature is one of the important limiting factors for growing season and geographical distribution of plants. Zoysiagrass (Zoysia Willd) is one of the widely used warm-season turfgrass that is distribute in many parts of the world. Zoysaigrass native to high latitude may have evolved higher cold tolerance than the ones native to low latitude. The objective of this study was to investigate the cold stress response in zoysiagrass native to diverse latitude at phenotypic, physiological and metabolic levels...
2018: PloS One
Hirofumi Enomoto, Takuya Sensu, Emi Yumoto, Takao Yokota, Hisakazu Yamane
RATIONALE: Abscisic acid (ABA), and 12-oxo-phytodienoic acid (OPDA) play crucial roles in seed development. However, because of their low ionization efficiencies, visualization by matrix-assisted laser desorption/ionization-imaging mass spectrometry (MALDI-IMS) has been difficult. In this study, we used on-tissue chemical derivatization (OTCD) with derivatization reagent Girard's T (GirT) in MALDI-IMS to visualize ABA and OPDA. METHODS: Immature Phaseolus vulgaris L...
June 10, 2018: Rapid Communications in Mass Spectrometry: RCM
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