Evaluation of Thellungiella halophila ST7 for improving salt tolerance in cotton

• 作者: ALI Mohsin NAZISH Tahmina JAVAID Ayesha ZHU Yonghong LI Jing ZHANG Huangyang WU Jie XIANG Chengbin WU Shenjie ALFATIH Alamin
• 来源期刊: 棉花学报
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: RESEARCH
• 页码范围: 1-11
• 页数: 11页
• 语种: 中文

摘要

Background: Gossypium hirsutum (upland cotton) is one of the principal fiber crops in the world. Cotton yield is highly affected by abiotic stresses, among which salt stress is considered as a major problem around the globe. Trans-genic approach is efficient to improve cotton salt tolerance but depending on the availability of salt tolerance genes. Results: In this study we evaluated salt tolerance candidate gene ST7 from Thellungiella halophila, encoding a homolog of Arabidopsis aluminum-induced protein, in cotton. Our results showed that ThST7 overexpression in cotton improved germination under NaCl stress as well as seedling growth. Our field trials also showed that ThST7 transgenic cotton lines produced higher yield under salt stress conditions. The improved salt tolerance of the transgenic cotton lines was partially contributed by enhanced antioxidation as shown by diaminobenzidine (DAB) and nitrotetrazolium blue chloride (NBT ) staining. Moreover, transcriptomic analysis of ThST7 overexpression lines showed a significant upregulation of the genes involved in ion homeostasis and antioxidation, consistent with the salt tolerance pheno-type of the transgenic cotton. Conclusions: Our results demonstrate that ThST7 has the ability to improve salt tolerance in cotton. The ThST7 trans-genic cotton may be used in cotton breeding for salt tolerance cultivars.