Response of Tea Plants to Drought Stress

2018 ◽  
pp. 63-81
Author(s):  
Wenjun Qian ◽  
Jianhui Hu ◽  
Xinfu Zhang ◽  
Lei Zhao ◽  
Yu Wang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Tea Plants

scholarly journals Amplification of early drought responses caused by volatile cues emitted from neighboring plants

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Jieyang Jin ◽  
Mingyue Zhao ◽  
Ting Gao ◽  
Tingting Jing ◽  
Na Zhang ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Plant Density ◽  
Stomatal Closure ◽  
Induced Volatiles ◽  
Positive Regulators ◽  
Tea Plants ◽  
Aba Content ◽  
Volatile Cues

AbstractPlants have developed sophisticated mechanisms to survive in dynamic environments. Plants can communicate via volatile organic compounds (VOCs) to warn neighboring plants of threats. In most cases, VOCs act as positive regulators of plant defense. However, the communication and role of volatiles in response to drought stress are poorly understood. Here, we showed that tea plants release numerous VOCs. Among them, methyl salicylate (MeSA), benzyl alcohol, and phenethyl alcohol markedly increased under drought stress. Interestingly, further experiments revealed that drought-induced MeSA lowered the abscisic acid (ABA) content in neighboring plants by reducing 9-cis-epoxycarotenoid dioxygenase (NCED) gene expression, resulting in inhibition of stomatal closure and ultimately decreasing early drought tolerance in neighboring plants. Exogenous application of ABA reduced the wilting of tea plants caused by MeSA exposure. Exposure of Nicotiana benthamiana to MeSA also led to severe wilting, indicating that the ability of drought-induced MeSA to reduce early drought tolerance in neighboring plants may be conserved in other plant species. Taken together, these results provide evidence that drought-induced volatiles can reduce early drought tolerance in neighboring plants and lay a novel theoretical foundation for optimizing plant density and spacing.

Identification and Analysis of Genes Involved in Auxin, Abscisic Acid, Gibberellin, and Brassinosteroid Metabolisms Under Drought Stress in Tender Shoots of Tea Plants

2019 ◽  
Vol 38 (11) ◽  
pp. 1292-1302 ◽  
Author(s):  
Hui Li ◽  
Rui-Min Teng ◽  
Jie-Xia Liu ◽  
Ruo-Yan Yang ◽  
Ya-Zhuo Yang ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Tea Plants

scholarly journals Fulvic acid ameliorates drought stress-induced damage in tea plants by regulating the ascorbate metabolism and flavonoids biosynthesis

BMC Genomics ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Jianhao Sun ◽  
Chen Qiu ◽  
Yiqian Ding ◽  
Yu Wang ◽  
Litao Sun ◽  
...  
Keyword(s):  
Drought Stress ◽  
Fulvic Acid ◽  
Flavonoids Biosynthesis ◽  
Tea Plants ◽  
Ascorbate Metabolism

Chloride and amino acids are associated with K+-alleviated drought stress in tea (Camellia sinesis)

2020 ◽  
Vol 47 (5) ◽  
pp. 398 ◽  
Author(s):  
Xianchen Zhang ◽  
Honghong Wu ◽  
Jingguang Chen ◽  
Linmu Chen ◽  
Xiaochun Wan
Keyword(s):  
Amino Acids ◽  
Drought Stress ◽  
Tea Plant ◽  
Limiting Factors ◽  
Factors Affecting ◽  
Chlorophyll Contents ◽  
Yield And Quality ◽  
Drought Tolerant ◽  
Tea Plants

Drought is one of the main limiting factors affecting tea plant yield and quality. Previous studies have reported that K+ (potassium) application significantly alleviated drought-induced damage in tea plants. However, the intrinsic mechanisms underlying K+-alleviated drought stress are still obscure. In our study, two contrasting varieties, Taicha12 (drought tolerant) and Fuyun6 (drought sensitive), were used to investigate the intrinsic mechanisms behind K+-alleviated drought stress in tea plants. In the present study, we compared with the case of tea plants under drought: higher water and chlorophyll contents were found in drought-stressed tea plants with an external K+ supply, confirming the role of externally supplied K+ in mitigating drought stress. We also found that an adequate K+ supply promoted Cl– accumulation in the mesophyll of Taicha12 (drought tolerant) over that of in Fuyun6 (drought sensitive). Moreover, Gly, Cys, Lys and Arg were not detected in Fuyun6 under ‘Drought’ or ‘Drought + K+’ conditions. Results showed that an exogenous supply of Arg and Val significantly alleviated drought-induced damage in Fuyun6, suggesting their role in K+-alleviated drought stress in tea plants. Collectively, our results show that chloride and amino acids are important components associated with K+-alleviated drought stress in tea plants.

scholarly journals Mycorrhiza improves plant growth and photosynthetic characteristics of tea plants in response to drought stress

BIOCELL ◽  
2022 ◽  
Vol 46 (5) ◽  
pp. 1339-1346
Author(s):  
FENGJUN DAI ◽  
ZIYI RONG ◽  
QIANGSHENG WU ◽  
ELSAYED FATHI ABD_ALLAH ◽  
CHUNYAN LIU ◽  
...  
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Photosynthetic Characteristics ◽  
Tea Plants

scholarly journals Drought stress triggers proteomic changes involving lignin, flavonoids and fatty acids in tea plants

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Honglian Gu ◽  
Yu Wang ◽  
Hui Xie ◽  
Chen Qiu ◽  
Shuning Zhang ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Drought Stress ◽  
Drought Resistance ◽  
Scientific Basis ◽  
Tandem Mass ◽  
Long Chain Fatty Acids ◽  
Tea Plants ◽  
Coa Reductase ◽  
Long Chain ◽  
Chain Fatty Acids

Abstract Drought stress triggers a series of physiological and biochemical changes in tea plants. It is well known that flavonoids, lignin and long-chain fatty acids play important roles in drought resistance. However, changes in proteins related to these three metabolic pathways in tea plants under drought stress have not been reported. We analysed the proteomic profiles of tea plants by tandem mass tag and liquid chromatography-tandem mass spectrometry. A total of 4789 proteins were identified, of which 11 and 100 showed up- and downregulation, respectively. The proteins related to the biosynthesis of lignin, flavonoids and long-chain fatty acids, including phenylalanine ammonia lyase, cinnamoyl-CoA reductase, peroxidase, chalcone synthase, flavanone 3-hydroxylase, flavonol synthase, acetyl-CoA carboxylase 1,3-ketoacyl-CoA synthase 6 and 3-ketoacyl-CoA reductase 1, were downregulated. However, the contents of soluble proteins, malondialdehyde, total phenols, lignin and flavonoids in the tea plants increased. These results showed that tea plants might improve drought resistance by inhibiting the accumulation of synthases related to lignin, flavonoids and long-chain fatty acids. The proteomic spectrum of tea plants provides a scientific basis for studying the pathways related to lignin, flavonoid and long-chain fatty acid metabolism in response to drought stress.

scholarly journals Exogenous abscisic acid induces the lipid and flavonoid metabolism of tea plants under drought stress

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhongshuai Gai ◽  
Yu Wang ◽  
Yiqian Ding ◽  
Wenjun Qian ◽  
Chen Qiu ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Flavonoid Metabolism ◽  
Tea Plants

Effects of drought stress on leaf physiological characteristics and root growth of the clone seedlings of wild tea plants

2017 ◽  
Vol 37 (21) ◽  
Author(s):  
牛素贞 NIU Suzhen ◽  
宋勤飞 SONG Qinfei ◽  
樊卫国 FAN Weiguo ◽  
陈正武 CHEN Zhengwu
Keyword(s):  
Drought Stress ◽  
Root Growth ◽  
Physiological Characteristics ◽  
Effects Of Drought ◽  
Tea Plants

scholarly journals Genome-wide identification, characterization and expression analysis of the expansin gene family under drought stress in tea (Camellia sinensis L.)

2021 ◽  
Vol 8 (1) ◽  
pp. 32-44
Author(s):  
Kuntala Bordoloi ◽  
Pallabika Dihingia ◽  
Debasish Krishnatreya ◽  
Niraj Agarwala
Keyword(s):  
Drought Stress ◽  
Stress Response ◽  
Network Analysis ◽  
Gene Family ◽  
Gene Structure ◽  
Promoter Regions ◽  
Cis Acting ◽  
Expansin Gene ◽  
Tea Plants ◽  
Public Datasets

During several developmental processes, expansins contribute to cell enlargement by promoting cell wall loosening. To explore the biological roles of expansins during drought stress response and to characterize different expansins in tea, we performed a detailed analysis of the expansin gene family covering phylogeny, gene structure, profiling of gene expression and co-expression network analysis. We identified a total of 40 expansin genes in the tea genome belonging to 3 subfamilies, out of which 29 tea expansins belong to EXPA, 9 to EXLA and 2 to EXPB subfamilies. A minimum of 3 and a maximum of 13 exons are present in the gene structure of expansins. Presence of drought stress responsive cis-acting elements in the upstream of promoter regions of 40% of the identified expansins shows that the putative expansins may have been involved in tea plant’s response to drought stress. At least 15 out of the 40 expansin genes are found to be differentially expressed in response to drought in each of the drought stress related public datasets analysed in-silico. TEA022767 belonging to EXPA subfamily is seen to be upregulated during drought stress, as revealed from the analysis of all three publicly available bio-projects. Co-expression network analysis shows that TEA022767 and TEA032954 form a connecting link between two expression correlation groups that further signifies their role in drought stress response in tea. This study helps to interpret and to understand the biological roles of diverse expansin genes in tea plants under drought stress conditions.

scholarly journals Exogenous Melatonin Enhances Cold, Salt and Drought Stress Tolerance by Improving Antioxidant Defense in Tea Plant (Camellia sinensis (L.) O. Kuntze)

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1826 ◽  
Author(s):  
Jiahao Li ◽  
Yiqing Yang ◽  
Kang Sun ◽  
Yi Chen ◽  
Xuan Chen ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Photochemical Efficiency ◽  
Tea Plant ◽  
Antioxidant Systems ◽  
Exogenous Melatonin ◽  
Photochemical Efficiency Of Psii ◽  
Salt And Drought Stress ◽  
Tea Plants

Melatonin is a biological hormone that plays crucial roles in stress tolerance. In this study, we investigated the effect of exogenous melatonin on abiotic stress in the tea plant. Under cold, salt and drought stress, increasing malondialdehyde levels and decreasing maximum photochemical efficiency of PSII were observed in tea leaves. Meanwhile, the levels of reactive oxygen species (ROS) increased significantly under abiotic stress. Interestingly, pretreatment with melatonin on leaves alleviated ROS burst, decreased malondialdehyde levels and maintain high photosynthetic efficiency. Moreover, 100 μM melatonin-pretreated tea plants showed high levels of glutathione and ascorbic acid and increased the activities of superoxide dismutase, peroxidase, catalase and ascorbate peroxidase under abiotic stress. Notably, melatonin treatments can positively up-regulate the genes (CsSOD, CsPOD, CsCAT and CsAPX) expression of antioxidant enzyme biosynthesis. Taken together, our results confirmed that melatonin protects tea plants against abiotic stress-induced damages through detoxifying ROS and regulating antioxidant systems.

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