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Direct Modulation of the Guard Cell Outward- Rectifying Potassium Channel （CORK） by abscisic acid

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Molecular Plant 2017年第11期10卷 1469-1472页

作者： Amanda Ooi Fouad Lemtiri-Chfieh Aloysius Wong Christoph Gehring Division of Biological and Environmental Sciences and Engineering 4700 King Abdullah University of Science and Technology Thuwa123955-6900 Kingdom of Saudi Arabia

Dear Editor,abscisic acid （ABA） induces turgot loss and hence stomatal closure by promoting rapid net K^＋ efflux from guard cells （GCs） through outward-rectifying K^＋（K^＋out） channels （Schroeder et al., 1987; Blatt, 1990）. The mechanisms of ABA signaling in GCs are detailed elsewhere （see Munemasa et al., 2015; Weiner et al., 2010; Pandey et al., 2007）. Briefly, ABA binds to the PYR/ PYL/RCARs, a family of soluble steroidogenic acute regulatory- related lipid transfer （START） proteins, and, in turn, inactivates the downstream PP2C （type 2C protein phosphatase）, leading to the activation of SnRK2.6 （SNF1 [sucrose non-fermenting-1- related protein kinase]/OST1 [open stomata 1]） protein kinases.

关键词： Direct Modulation of the Guard Cell Outward- Rectifying Potassium Channel (CORK) abscisic acid

Phytohormones Jasmonic acid,Salicylic acid,Gibberellins,and abscisic acid are Key Mediators of Plant Secondary Metabolites

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World Journal of Traditional Chinese Medicine 2021年第3期7卷 307-325页

作者： Zong-You Lv Wen-Jing Sun Rui Jiang Jun-Feng Chen Xiao Ying Lei Zhang Wan-Sheng Chen Research and Development Center of Chinese Medicine Resources and Biotechnology Shanghai University of Traditional Chinese MedicineShanghai 201203 Department of Pharmacy Changzheng HospitalSecond Military Medical UniversityShanghai 200003 Department of Pharmaceutical Botany School of PharmacySecond Military Medical UniversityShanghai 200433China

Until recently,many studies on the role of phytohormones in plant secondary metabolism focused on jasmonic acid(JA),salicylic acid(SA),gibberellins(GA),and abscisic acid(ABA).It is now clear that phytohormone?induced regulation of signaling occurs via regulation of the biosynthetic pathway genes at the transcriptional level or through posttranslational regulation,or an increase in secondary metabolite deposition(e.g.,trichomes).Here,we summarize recent advances,updating the current reports on the molecular machinery of phytohormones JA,SA,GA,and ABA involved in plant secondary *** review emphasizes the differences and similarities among the four phytohormones in regulating various secondary metabolic biosynthetic pathways and also provides suggestions for further research.

关键词： abscisic acid gibberellins jasmonic acid salicylic acid secondary metabolism

Multiple forms of vitamin B_(6) regulate salt tolerance by balancing ROS and abscisic acid levels in maize root

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Stress Biology 2022年第1期2卷 197-210页

作者： Chongchong Lu Yuan Tian Xuanxuan Hou Xin Hou Zichang Jia Min Li Mingxia Hao Yanke Jiang Qingbin Wang Qiong Pu Ziyi Yin Yang Li Baoyou Liu Xiaojing Kang Guangyi Zhang Xinhua Ding Yinggao Liu State Key Laboratory of Crop Biology Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaian 271018ShandongChina Shandong Pengbo Biotechnology Co. LTDTaian 271018China Shandong Agriculture and Engineering University Jinan 250000ShandongChina Yantai Academy of Agricultural Sciences Yantai 265500ShandongChina Shandong Xinyuan Seed Industry Co. LTDTaian 271000China

Salt stress causes osmotic stress,ion toxicity and oxidative stress,inducing the accumulation of abscisic acid(ABA)and excessive reactive oxygen species(ROS)production,which further damage cell structure and inhibit the development of roots in *** study showed that vitamin B_(6)(VB_(6))plays a role in plant responses to salt stress,however,the regulatory relationship between ROS,VB_(6) and ABA under salt stress remains unclear yet in *** our study,we found that salt stress-induced ABA accumulation requires ROS production,in addition,salt stress also promoted VB_(6)(including pyridoxamine(PM),pyridoxal(PL),pyridoxine(PN),and pyridoxal 5′-phosphate(PLP))accumulation,which involved in ROS scavenging and ABA ***,VB_(6)-deficient maize mutant small kernel2(smk2)heterozygous is more susceptible to salt stress,and which failed to scavenge excessive ROS effectively or induce ABA accumulation in maize root under salt stress,interestingly,which can be restored by exogenous PN and PLP,*** to these results,we proposed that PN and PLP play an essential role in balancing ROS and ABA levels under salt stress,respectively,it laid a foundation for VB_(6) to be better applied in crop salt resistance than ABA.

关键词： Vitamin B_(6) abscisic acid Reactive oxygen species Salt stress smk2

Growth and abscisic acid responses of Medicago sativa to water stress at different growth stages

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Frontiers of Agricultural Science and Engineering 2018年第1期5卷 80-86页

作者： Yue LI Liqiang WAN Yufei WANG Xianglin LI Institute of Animal Sciences Chinese Academy of Agricultural Sciences

A pot experiment was conducted in a greenhouse with three alfalfa(Medicago sativa) cultivars,Aohan, Zhongmu No.1 and Sanditi, to examine the morphological and physiological responses of alfalfa to water stress. The response of alfalfa to water stress at different growth stages was generally similar, but varied among cultivars. At the branching, flowering and podding stages, the shoot biomasses of Aohan and Zhongmu No.1 were greatly affected by, and responded quickly to, water stress. The shoot biomass of Sanditi was not affected by mild water stress, but had a slight response to moderate and severe water stress. The root/shoot ratios in Aohan and Zhongmu No.1 were more sensitive to water stress than in Sanditi, with the root/shoot ratio in Aohan increasing most significantly. At flowering, the root/shoot ratio was the highest and the effect of water stress the greatest. The abscisic acid(ABA) concentration in the roots of Aohan and Zhongmu No.1 increased under water stress, while in Sanditi there was only a slight or delayed response of ABA concentration.

关键词： abscisic acid alfalfa drought response growth stage water deficit

Effects of Exogenous abscisic acid and Water Stress on the Growth Response of Subterranean Clover of Different Genotypes

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Acta Botanica Sinica 2002年第12期44卷 1425-1431页

作者：许兴郑国琦邓西平 Hipolito MEDRANO 宁夏农业生物技术重点实验室宁夏大学生命科学学院中国科学院水利部水土保持研究所 Department de Biologia. Instituto Mediterraneo de EstudiosAvanzados (UIBCSIC). Universitat de les illes Balears Carretera Valldemossa Km.75 07071 Palma de Mallorca Baleares Spain

The response of subterranean clover ( Trifolium subterraneum L.) to different abscisic acid (ABA) concentrations (10 -6 , 10 -5 , 10 -4 mol/L) in nutrient solution and to water stress were studied in growth room. Six cultivars of contrasting yield capacity were compared. Plants remained growing in Hoagland solution or pots until at least four full_developed leaves appeared. The ABA was then applied and the fresh weight, leaf number and length of the largest root were measured at 1, 4, 7 and 11 d after ABA treatment. The above parameters were also measured at 15 d under water stress. In all the tested genotypes ABA caused similar reduction in these growth parameters, as well as a significant decrease of leaf water potential which was dependent on ABA concentration. The average growth reduction after 11 d under 10 -4 mol/L ABA coincided with the range of these crops under water stress in pot experiments. On average of the different genotypes, leaf number, area of full_developed leaf and the dry weight per plant decreased by about 50% whereas the root/shoot ratio increased by 80%.The genotype variation and ranking for this treatment were rather similar to the same genotypes in pot experiments. The genotypes, Clare, Nuba and Seaton Park, showed the best results under both control and ABA treated conditions and water stress conditions. The similarity between the response to ABA in nutrient solution and to water stress opens the possibility to use this approach as a way to quantify the drought resistance of subterranean clover genotypes.

关键词： Trifolium subterraneum water stress abscisic acid nutrient solution growth

abscisic acid downregulates corticotrophin-releasing hormone gene expression through LANCL2-regulated retinoic acid receptor

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Abscisic acid downregulates corticotrophin-releasing hormone...

In Vivo Tissue-dependent abscisic acid Specific-binding Proteins with High Affinity in Cytosol of Developing Apple Fruits

中国神经科学学会第十届全国学术会议

作者： Cong-Cong QI Zhi ZHANG Hui FANG Ji LIU Nan ZHOU Jin-Fang GE Fang-Han CHEN Yu-Mian SHU Cheng-Bin XIANG Jiang-Ning ZHOU CAS Key Laboratory of Brain Function and Diseases School of Life ScienceUniversity of Science and Technology of China Plant Molecular Biology Laboratory School of Life ScienceUniversity of Science and Technology of China The Seventh Hospital of Hangzhou Hangzhou Mental Health Center

abscisic acid（ABA） is a crucial plant hormone with essential functions in plant response to various environmental *** ABA plays also a role in mammals stress response remains ***-releasing hormone（CRH） is considered to be the central driving force of the hypothalamic-pituitary-adrenal（HPA）-axis,the key structure of stress response in *** we reported for the first time that the hypothalamus of rat showed the highest concentration of ABA compared with cortex and hippocampus under basal *** acute stress condition,ABA concentration increased in serum and decreased in the ***,short term ABA administration improved ICR mice learned ***,a decreased CRH expression and a down-regulation of lanthionine synthetase component C like protein 2（LANCL2）,the reported membrane receptor of ABA in mammals,were found after the treatment of ABA in BE（2）-C *** knocking down LANCL2 expression,ABA reduced CRH mRNA expression was *** addition,ABA also inhibited the expression of retinoic acid receptor alpha（RARα）,which could facilitate the expression of ***,silencing LANCL2 resulted in the decreased RARα expression both at mRNA level and protein level accompanied with the reduced CRH mRNA expression,while knocking down RARα had no effect on the expression of *** results suggest that ABA may be involved in stress response in mammals through LANCL2-RARαpathway.

关键词： abscisic acid corticotrophin-releasing hormone retinoic acid receptor alpha lanthionine synthetase component C-like protein 2

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Acta Botanica Sinica 2001年第11期43卷 1115-1122页

作者：张大鹏陈尚武中国农业大学果树分子发育实验室

The in vivo highly tissue-dependent abscisic acid (ABA) specific-binding sites localized in cytosol were identified and characterized in the flesh of developing apple ( Malus pumila L. cv. Starkrimon) fruits. ABA binding activity was scarcely detectable in the microsomes and the cytosolic fraction isolated from the freshly harvested fruits via an in vitro ABA binding incubation of the subcellular fractions. If, however, instead that the subcellular fractions were in vitro incubated in H-3-ABA binding medium, the flesh tissue discs were directly in vivo incubated in H-3-ABA binding medium, a high ABA binding activity to the cytosolic fraction isolated from these tissue discs was detected. The in vivo ABA binding capacity of the cytosolic fraction was lost if the tissue discs had been pretreated with boiling water, indicating that the ABA binding needs a living state of tissue. The in vivo tissue-dependent binding sites were shown to possess protein nature with both active serine residua and thiol-group of cysteine residua in their functional binding center. The ABA binding of the in vivo tissue-dependent ABA binding sites to the cytosolic fraction was shown to be saturable, reversible, and of high affinity. The scatchard plotting gave evidence of two different classes of ABA binding proteins, one with a higher affinity ( Kd = 2.9 nmol/L) and the other with lower affinity ( Kd = 71.4 nmol/L). Phaseic acid, 2-trans-4-trans-ABA or cis-trans-(-)-ABA had substantially no affinity to the binding proteins, indicating their stereo-specificity to bind physiologically active ABA. The time course, pH- and temperature-dependence of the in vivo tissue-dependent binding proteins were determined. It is hypothesized that the detected ABA-binding proteins may be putative ABA-receptors that mediate ABA signals during fruit development.

关键词： abscisic acid ABA-binding protein apple fruit

Purification and Analysis of abscisic acid-Specifically-Inducible Proteins from Rice Callus

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Rice Science 2007年第2期14卷 111-117页

作者： JIANG Hua 1, 2, XU Zheng-jun 2, 3, GAO Xiao-ling 2 (1Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, China 2Department of Food and Bioengineering, Shandong Institute of Light Industry, Ji’nan 250353, China 3 Key Laboratory of Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Ya’an 625014, China) Rice Research Institute Sichuan Agricultural University Wenjiang 611130 China Department of Food and Bioengineering Shandong Institute of Light Industry Ji'nan 250353 China Key Laboratory of Crop Genetic Resources and Improvement Ministry of Education Sichuan Agricultural University Ya'an 625014 China

Two ABA-specifically-inducible proteins from rice callus were isolated and purified by precipitation with 65-100% saturated (NH4)2SO4, followed by the DEAE-sepharose, TSK-gel, and two-dimension electrophoresis. Iso-electric points (pI) of the proteins with the same molecular mass (24.5 kD) were 6.1 and 6.9, respectively. The Western blot analysis indicated that the proteins expressed in different tissues were obviously different. The A1 (pI 6.1) protein was only detected in calli treated with ABA and seed embryos (SE). However, the A2 (pI 6.9) protein was found not only in the calli treated with ABA and SE, but also in the white dry callus. Thus it suggested that the two proteins might play some important roles in the processes of seed embryo (or somatic embryo) formation.

关键词： rice callus abscisic acid specifically-inducible protein purification expression

Effects of Formulated Fertilizer Synergist on abscisic acid Accumulation, Proline Content and Photosynthetic Characteristics of Rice under Drought

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Rice science 2007年第1期14卷 42-48页

作者： WANG Shao-xian XIA Shi-tou PENG Ke-qin KUANG Feng-chun CAO Yong XIAO Lang-tao Key Laboratory of Phytohormones Hunan Agricultural University Changsha 410128 China Changde Cigarette Factory Changde 415000 China Key Laboratory of Hunan Forest Product ＆ Chemical Industry Engineering Jishou University Zhangjiajie 427000 China

To investigate the effects of formulated fertilizer synergist on the drought tolerance in rice, pot experiment was conducted to analyze the photosynthetic characteristics and the accumulation of abscisic acid （ABA） and proline in middle-season rice variety Peiliangyou 93. The synergist could improve the net photosynthetic rate, and coordination between the water loss and the CO2 absorption as well as reduce the harmful effect on photosynthetic process under drought conditions. Under drought, the ABA accumulated massively both in roots and leaves, while the ABA content in roots was far higher than that in leaves. The results indicate that synergist could increase the ABA accumulation, but reduce the proline accumulation in rice plant under drought.

关键词： fertilizer synergist drought abscisic acid proline photosynthetic characteristics