文献类型： 外文期刊

作者： Hossain, Md. Shakhawat ¹ ; Li, Jing ² ; Wang, Chenyang ¹ ; Monshi, Fakhrul Islam ³ ; Tabassum, Rehenuma ⁴ ; Islam, Md Ashraful ⁵ ; Faruquee, Muhiuddin ⁶ ; Muktadir, Md. Abdul ⁷ ; Mia, Md Sultan ⁸ ; Islam, A. K. M. Mominul ⁹ ; Hasan, Ahmed Khairul ⁹ ; Sikdar, Ashim ¹⁰ ; Feng, Baili ¹ ;

作者机构： 1.Northwest A&F Univ, Coll Agron, State Key Lab Crop Stress Resistance & High Effici, Xianyang 712100, Peoples R China

2.Yanan Univ, Sch Life Sci, Shaanxi Key Lab Chinese Jujube, Yanan 716000, Peoples R China

3.Sylhet Agr Univ, Dept Genet & Plant Breeding, Sylhet 3100, Bangladesh

4.Sylhet Agr Univ, Dept Crop Bot & Tea Prod Technol, Sylhet 3100, Bangladesh

5.Univ North Texas, BioDiscovery Inst, Dept Biol Sci, Denton, TX 76203 USA

6.Chinese Acad Agr Sci, Grad Sch, Biochem & Mol Biol, Inst Crop Sci, Beijing 100081, Peoples R China

7.Univ Southern Queensland, Inst Life Sci & Environm, Toowoomba, Qld 4350, Australia

8.Univ Western Australia, Inst Agr, 35 Stirling Hwy, Perth, WA 6009, Australia

9.Bangladesh Agr Univ, Dept Agron, Mymensingh 2202, Bangladesh

10.Sylhet Agr Univ, Dept Agroforestry & Environm Sci, Sylhet 3100, Bangladesh

关键词： drought; polyethylene glycol; germination; antioxidant; secondary metabolite

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2024 年 14 卷 3 期

页码：

收录情况： SCI

摘要： Drought stress is one of the key factors impeding agricultural productivity worldwide. This experiment aimed at investigating the polyethylene glycol (PEG)-induced drought stress effects on seed germination, physiology, and biochemical mechanisms in Tartary buckwheat genotypes. Four PEG-induced stress conditions (0%, 10%, 20%, and 30%) were applied to 14 selected genotypes at the germination stage to evaluate their stress tolerance capacity. Significant differences were obtained in germination percentage, relative water content (RWC), and all growth parameters among the studied 14 genotypes. Based on the stress tolerance index (STI), XiNong 9943, XiNong 9940, and QianKu-5 were found to be tolerant, and QuanKu-4 was susceptible. These cultivars were selected for further physiological and biochemical characterization. The results demonstrated that the activity of enzymes was significantly increased with the increase in PEG dose. SOD (superoxide dismutase), POD (peroxidase), CAT (catalase), and APX (ascorbate peroxidase) levels obtained at 30% PEG in the XiNong 9943 genotype were 2.01, 2.19, 4.92, and 4.46 times higher, respectively, than the normal growth condition (T0). Moreover, the secondary metabolite content also increased with the increase in PEG dose. At 30% PEG, the genotype XiNong 9943 yielded phenols, flavonoids, polyphenol oxidase (PPO), and phenylalanine ammonia lyase (PAL) levels that were higher by 131%, 95%, 154%, and 164%, respectively, than T0 condition. From both the findings of the activity of enzymes and the secondary metabolite content, the genotypic response to drought was ranked in the following order: XiNong 9943 > XiNong 9940 > QianKu-5 > QianKu-4, which supported the STI selection system. Assessing the overall performance, the genotype XiNong 9943 shows drought tolerance, which can be useful material for future buckwheat breeding programs.