{"id":4013,"date":"2025-12-23T14:28:30","date_gmt":"2025-12-23T06:28:30","guid":{"rendered":"https:\/\/ramiefb.meealldemo.com\/?post_type=blog&#038;p=4013"},"modified":"2025-12-23T14:28:30","modified_gmt":"2025-12-23T06:28:30","slug":"main-content-of-the-study","status":"publish","type":"blog","link":"https:\/\/www.antsjapan.com\/en\/blog\/main-content-of-the-study\/","title":{"rendered":"Main Content of the Study on the Function of the Ramie BnGCL1 Gene in Response to Drought Stress"},"content":{"rendered":"<h2 class=\"wp-block-heading\">I. Research Background and Objectives<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Drought is a major abiotic stress that affects plant growth; it inhibits growth, reduces photosynthetic efficiency, and causes metabolic disorders. As a unique bast fiber crop in China, ramie (Boehmeria nivea L.) is highly drought-tolerant, but drought still affects its yield and quality.<\/li>\n\n\n\n<li>Glutamate-cysteine ligase (GCL), also known as \u03b3-glutamyl cysteine synthetase (\u03b3-GCS), catalyzes the biosynthesis of glutathione (GSH). GSH plays a key role in plant antioxidant defense and maintaining redox homeostasis, although research on plant GCL genes remains limited.<\/li>\n\n\n\n<li>This study aims to investigate the functional mechanism of the ramie BnGCL1 gene under drought stress, thereby providing a theoretical basis and a candidate gene for research on the molecular mechanisms underlying ramie drought resistance and for the breeding of drought-resistant varieties.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">II. Research Materials and Methods<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">(I) Experimental Materials<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ramie variety: Zhongzhu No. 1; Arabidopsis thaliana Col-0 and related vectors (pCAMBIA1300-35S-BnGCL1-myc, etc.) were stored in the laboratory.<\/li>\n\n\n\n<li>Agrobacterium tumefaciens GV3101 and Escherichia coli strains TOP10 and DH5\u03b1 were purchased from Shanghai Weidi Biotechnology Co., Ltd.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">(II) Core Research Methods<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Bioinformatics analysis: Tools such as NCBI and ExPASy were used to analyze the ORF, the physicochemical properties of the protein, conserved domains, and species homology of the BnGCL1 gene.<\/li>\n\n\n\n<li>Gene expression analysis: 20% PEG-200 was used to simulate drought stress, and qPCR was used to detect the expression level of the BnGCL1 gene in ramie leaves at different time points.<\/li>\n\n\n\n<li>Overexpression verification: An overexpression vector was constructed and transformed into Arabidopsis thaliana. After screening positive lines, the phenotype, physiological indicators, and expression of drought-resistance-related genes in plants under drought stress were determined.<\/li>\n\n\n\n<li>Silencing verification: The pTRV-VIGS system was used to silence the BnGCL1 gene in ramie, and changes in plant phenotype and MDA content under drought stress were observed.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">III. Key Research Findings<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">(I) Characteristics of the BnGCL1 Gene<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gene sequence: The ORF is 1,581 bp long and encodes 526 amino acids; the protein has an isoelectric point of 5.79, a molecular weight of 59,123.98 Da, is a stable protein, and contains a conserved PLN02611 domain.<\/li>\n\n\n\n<li>Homology: The amino acid sequence similarity with Nicotiana tabacum, Arabidopsis thaliana, and other plants exceeds 80%, and it is most closely related to Arabidopsis thaliana and Brassica juncea.<\/li>\n\n\n\n<li>Expression pattern: It is expressed in the roots, stems, and leaves of ramie, and the expression level peaks at 12 hours of drought stress, reaching 3.62 times the level observed before treatment.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">(II) Drought Resistance Effect of Overexpressing BnGCL1<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Phenotype: Under drought stress, the root length of the overexpressed Arabidopsis thaliana increased by 28.92%\u201357.23%, and the fresh weight increased by 81.42%\u2013131.19%, indicating better growth than the wild type.<\/li>\n\n\n\n<li>Photosynthetic pigments: The chlorophyll a content increased by 25.07%\u201399.09%, and the chlorophyll b content increased by 11.14%\u201347.26%, resulting in more stable photosynthetic capacity.<\/li>\n\n\n\n<li>Physiological indicators: The activities of antioxidant enzymes such as APX and \u03b3-GCL were significantly increased; GSSG levels rose; and SOD activity improved, enhancing the ability to scavenge reactive oxygen species. Meanwhile, Pro and GSH levels decreased, which is thought to be related to metabolic redistribution or consumption.<\/li>\n\n\n\n<li>Gene expression: It significantly upregulated drought-responsive genes such as AtGST1, AtGST11, AtNCED3, and AtWRKY40, which are involved in antioxidant and ABA signaling pathways.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">(III) Effects of Silencing BnGCL1<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Under drought stress, the leaves of the silenced lines showed more pronounced wilting, and the MDA content was significantly higher than that of the control, indicating a significant decrease in drought resistance, which confirms the drought-resistant function of BnGCL1.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">IV. Research Conclusions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The BnGCL1 gene contributes to the plant\u2019s drought stress response by enhancing antioxidant enzyme activity, regulating the metabolism of osmotic adjustment substances, and upregulating the expression of drought-responsive genes, thereby significantly improving the plant\u2019s drought resistance. This gene serves as an important candidate gene for the molecular breeding of drought-resistant ramie and also provides a reference for improving the drought resistance of other crops.<\/p>","protected":false},"template":"","class_list":["post-4013","blog","type-blog","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.antsjapan.com\/en\/wp-json\/wp\/v2\/blog\/4013","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.antsjapan.com\/en\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.antsjapan.com\/en\/wp-json\/wp\/v2\/types\/blog"}],"wp:attachment":[{"href":"https:\/\/www.antsjapan.com\/en\/wp-json\/wp\/v2\/media?parent=4013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}