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<p>Agriculture productivity faces growing threats from drought stress, which negatively impacts crop yields and sustainability globally. Exploring the potential of endophytic bacteria extracted from desert plants has emerged as a promising strategy for improving drought tolerance in crops. This study explores the plant growth-promoting influences of the bacterial endophytes RAE-11 (<i>Priestua endophytica</i>) isolated from <i>Fagonia sp</i>., in Rajasthan, India. RAE-11 exhibited traits such as the production of indole-3-acetic acid (51.82&#xa0;mg/mL under drought), siderophore, ammonia, phosphate solubilization, and nitrogen fixation. Soybean plants inoculated with RAE-11 showed increased shoot length (12.9&#xa0;cm control, 10.4&#xa0;cm drought), root length (19.9&#xa0;cm control, 13.5&#xa0;cm drought), shoot weight (1.638&#xa0;g control, 1.469&#xa0;g drought), root weight (0.388&#xa0;g control, 0.485&#xa0;g drought), relative water content (74.4% control, 66.25% drought), and total chlorophyll amount as compared to non-inoculated plants. Endophyte inoculation also reduced H<sub>2</sub>O<sub>2</sub> levels (1.36 mM/g FW control, 1.92 mM/g FW drought), increased peroxidase activity (1.22 U/mg FW control, 2.47 U/mg FW drought), and elevated antioxidant enzyme activities. These findings highlight the efficacy of RAE-11 in enhancing soybean growth and drought tolerance through phytohormone production, nutrient acquisition, and antioxidant modulation, suggesting promising applications for sustainable agriculture.</p>

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Enhancing soybean growth under drought stress through bio-priming with desert endophyte Priestua endophytica strain RAE-11

  • 期刊论文

  • 发表日期：

    2025年4月5日

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  • Mahima Choudhary,
  • Bhakti Patel,
  • Margi Patel,
  • Nisha Choudhary,
  • Snehal Bagatharia,
  • Rakesh Kumar Verma,
  • Gulab Singh,
  • Virendra Kumar Yadav,
  • Ashish Patel

摘要

Agriculture productivity faces growing threats from drought stress, which negatively impacts crop yields and sustainability globally. Exploring the potential of endophytic bacteria extracted from desert plants has emerged as a promising strategy for improving drought tolerance in crops. This study explores the plant growth-promoting influences of the bacterial endophytes RAE-11 (Priestua endophytica) isolated from Fagonia sp., in Rajasthan, India. RAE-11 exhibited traits such as the production of indole-3-acetic acid (51.82 mg/mL under drought), siderophore, ammonia, phosphate solubilization, and nitrogen fixation. Soybean plants inoculated with RAE-11 showed increased shoot length (12.9 cm control, 10.4 cm drought), root length (19.9 cm control, 13.5 cm drought), shoot weight (1.638 g control, 1.469 g drought), root weight (0.388 g control, 0.485 g drought), relative water content (74.4% control, 66.25% drought), and total chlorophyll amount as compared to non-inoculated plants. Endophyte inoculation also reduced H2O2 levels (1.36 mM/g FW control, 1.92 mM/g FW drought), increased peroxidase activity (1.22 U/mg FW control, 2.47 U/mg FW drought), and elevated antioxidant enzyme activities. These findings highlight the efficacy of RAE-11 in enhancing soybean growth and drought tolerance through phytohormone production, nutrient acquisition, and antioxidant modulation, suggesting promising applications for sustainable agriculture.