共查询到20条相似文献,搜索用时 390 毫秒
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Ruicai Long Qingchuan Yang Junmei Kang Tiejun Zhang Huimin Wang Mingna Li Ze Zhang 《Plant cell reports》2013,32(8):1289-1298
Key message
We cloned a novel salt stress-induced glycine-rich protein gene ( MsGRP ) from alfalfa. Its overexpression retards seed germination and seedling growth of transgenic Arabidopsis after salt and ABA treatments.Abstract
Since soil salinity is one of the most significant abiotic stresses, salt tolerance is required to overcome salinity-induced reductions in crop productivity. Many glycine-rich proteins (GRPs) have been implicated in plant responses to environmental stresses, but the function and importance of some GRPs in stress responses remain largely unknown. Here, we report on a novel salt stress-induced GRP gene (MsGRP) that we isolated from alfalfa. Compared with some glycine-rich RNA-binding proteins, MsGRP contains no RNA recognition motifs and localizes in the cell membrane or cell wall according to the subcellular localization result. MsGRP mRNA is induced by salt, abscisic acid (ABA), and drought stresses in alfalfa seedlings, and its overexpression driven by a constitutive cauliflower mosaic virus-35S promoter in Arabidopsis plants confers salinity and ABA sensitivity compared with WT plants. MsGRP retards seed germination and seedling growth of transgenic Arabidopsis plants after salt and ABA treatments, which implies that MsGRP may affect germination and growth through an ABA-dependent regulation pathway. These results provide indirect evidence that MsGRP plays important roles in seed germination and seedling growth of alfalfa under some abiotic stress conditions. 相似文献5.
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Plants frequently face challenges caused by various abiotic stresses, including drought, and have evolved defense mechanisms to counteract the deleterious effects of these stresses. The phytohormone abscisic acid (ABA) is involved in signal transduction pathways that mediate defense responses of plants to abiotic stress. Here, we report a new function of the CaDIN1 protein in defense responses to abiotic stress. The CaDIN1 gene was strongly induced in pepper leaves exposed to ABA, NaCl, and drought stresses. CaDIN1 proteins share high sequence homology with other known DIN1 proteins and are localized in chloroplasts. We generated CaDIN1-silenced peppers and overexpressing transgenic Arabidopsis plants and evaluated their response to ABA and drought stress. Virus-induced gene silencing of CaDIN1 in pepper plants conferred enhanced tolerance to drought stress, which was accompanied by low levels of lipid peroxidation in dehydrated leaves. CaDIN1-overexpressing transgenic plants exhibited reduced sensitivity to ABA during seed germination and seedling stages. Transgenic plants were more vulnerable to drought than that by the wild-type plants because of decreased expression of ABA responsive stress-related genes and reduced stomatal closure in response to ABA. Together, these results suggest that CaDIN1 modulates drought sensitivity through ABA-mediated cell signaling. 相似文献
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Soo Young Kim 《Journal of Plant Biology》2007,50(2):117-121
Abscisic acid (ABA) is a major plant hormone that controls germination, seedling growth, and seed development. During the
vegetative phase, ABA plays a key regulatory role in adaptive responses to common abiotic stresses, such as drought, high
salinity, and cold. In seeds, ABA modulates the synthesis of storage components and prevents the precocious germination of
embryos. ABA-regulated processes are critical for plant growth and survival, especially under unfavorable environmental conditions.
Numerous genetic and biochemical studies to delineate signal transduction pathways have led to the identification of a large
number of ABA signaling components. However, our knowledge about specific response pathways is still fragmentary. Over the
past several years, significant progress has been made in identifying key regulators of early events in the ABA response.
In this short review, new advances in ABA signaling research, especially those focused on ABA receptors, will be summarized. 相似文献
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OsCIPK31, a CBL-interacting protein kinase is involved in germination and seedling growth under abiotic stress conditions in rice plants 总被引:1,自引:0,他引:1
Hai-long Piao Yuan-hu Xuan Su Hyun Park Byoung Il Je Soon Ju Park Sung Han Park Chul Min Kim Jin Huang Guo Kui Wang Min Jung Kim Sang Mo Kang In-Jung Lee Taek-Ryoun Kwon Yong Hwan Kim Un-sang Yeo Gihwan Yi DaeYoung Son Chang-deok Han 《Molecules and cells》2010,30(1):19-27
Calcineurin B-like protein-interacting protein kinases (CIPKs) are a group of typical Ser/Thr protein kinases that mediate calcium signals. Extensive studies using Arabidopsis plants have demonstrated that many calcium signatures that activate CIPKs originate from abiotic stresses. However, there are few reports on the functional demonstration of CIPKs in other plants, especially in grasses. In this study, we used a loss-of-function mutation to characterize the function of the rice CIPK gene OsCIPK31. Exposure to high concentrations of NaCl or mannitol effected a rapid and transient enhancement of OsCIPK31 expression. These findings were observed only in the light. However, longer exposure to most stresses resulted in downregulation of OsCIPK31 expression in both the presence and absence of light. To determine the physiological roles of OsCIPK31 in rice plants, the sensitivity of oscipk31::Ds, which is a transposon Ds insertion mutant, to abiotic stresses was examined during germination and seedling stages. oscipk31::Ds mutants exhibited hypersensitive phenotypes to ABA, salt, mannitol, and glucose. Compared with wild-type rice plants, mutants exhibited retarded germination and slow seedling growth. In addition, oscipk31::Ds seedlings exhibited enhanced expression of several stress-responsive genes after exposure to these abiotic stresses. However, the expression of ABA metabolic genes and the endogenous levels of ABA were not altered significantly in the oscipk31::Ds mutant. This study demonstrated that rice plants use OsCIPK31 to modulate responses to abiotic stresses during the seed germination and seedling stages and to modulate the expression of stress-responsive genes. 相似文献
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Abscisic acid (ABA) is a phytohormone that plays an important role in responses to environmental stresses as well as seed maturation and germination. Intracellular signaling by ABA has been rigorously investigated in relation to stomatal guard-cell regulation, seed germination and abiotic stress responses. However, intercellular regulation of ABA, including the molecular basis of ABA transport systems, has hardly been examined in any plant species. Based on genetic and biochemical analyses, we present evidence that one of the ATP-binding cassette (ABC) transporter genes, AtABCG25, encodes a protein that functions as an ABA exporter through the plasma membrane and is involved in the intercellular ABA signaling pathway. The ABC-type transporter is conserved in model species from E. coli to humans and is reported to transport various metabolites or signaling molecules in an ATP-dependent manner. At same time, another ABC transporter in Arabidopsis, AtABCG40, was independently reported to function as an ABA importer in plant cells. These findings strongly suggest the active control of ABA transport between plant cells, and they provide a novel impetus for examining ABA intercellular regulation.Key words: Arabidopsis, ABA, transport, ABC transporter, ABCG, transposontagged lines 相似文献
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Yong-Tao Yu Zhen Wu Kai Lu Chao Bi Shan Liang Xiao-Fang Wang Da-Peng Zhang 《Journal of Plant Biology》2016,59(2):152-161
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Nitric oxide (NO) plays important roles in plant development, and biotic and abiotic stress responses. In a recent study, we showed that endogenous NO negatively regulates abscisic acid (ABA) signaling in guard cells by inhibiting sucrose nonfermenting 1 (SNF1)-related protein kinase 2.6 (SnRK2.6)/open stomata 1(OST1) through S-nitrosylation. Application of NO breaks seed dormancy and alleviates the inhibitory effect of ABA on seed germination and early seedling growth, but it is unclear how NO functions at the stages of seed germination and early seedling development. Here, we show that like SnRK2.6, SnRK2.2 can be inactivated by S-nitrosoglutathione (GSNO) treatment through S-nitrosylation. SnRK2.2 and the closely related SnRK2.3 are known to play redundant roles in ABA inhibition of seed germination in Arabidopsis. We found that treatment with the NO donor SNP phenocopies the snrk2.2snrk2.3 double mutant in conferring ABA insensitivity at the stages of seed germination and early seedling growth. Our results suggest that NO negatively regulates ABA signaling in germination and early seedling growth through S-nitrosylation of SnRK2.2 and SnRK2.3. 相似文献