| Title: | Volatile organic compounds produced by Pseudomonas pseudoalcaligenes alleviated drought stress by modulating defense system in maize (Zea mays L.) |
| Author(s): | Yasmin H; Rashid U; Hassan MN; Nosheen A; Naz R; Ilyas N; Sajjad M; Azmat A; Alyemeni MN; |
| Address: | "Department of Biosciences, COMSATS University, Islamabad, Pakistan. Department of Botany, PMAS-Arid University Rawalpindi, Rawalpindi, Pakistan. Microbiology Botany Department, College of Science, King Saud University, Riyadh, Saudi Arabia" |
| ISSN/ISBN: | 1399-3054 (Electronic) 0031-9317 (Linking) |
| Abstract: | "Research on plant growth-promoting bacteria (PGPR) revealed an effective role of bacterial volatile organic compounds (VOCs) in stress alleviation. Out of 15 PGPR strains, infection with VOCs from Pseudomonas pseudoalcaligenes' resulted in maximum germination, growth promotion, and drought tolerance in maize plants. The VOCs of P. pseudoalcaligenes caused induced systemic tolerance in maize plants during 7 days of drought stress. The VOCs exposed plants displayed resistance to drought stress by reducing electrolyte leakage and malondialdehyde content and increasing the synthesis of photosynthetic pigments, proline, and phytohormones contents. Maize plants revealed enhanced resistance by showing higher activities of antioxidant defense enzymes both in shoots and roots under drought stress. Activities of antioxidant enzymes were more pronounced in shoots than roots. Gas chromatography and mass spectrophotometric (GC-MS) analysis comparing VOCs produced by the most efficient P. pseudoalcaligenes strain and inefficient strains of Pseudomonas sp. grown in culture media revealed nine compounds that they had in common. However, dimethyl disulfide, 2,3-butanediol, and 2-pentylfuran were detected only in P. pseudoalcaligenes, indicating these compounds are potential candidates for drought stress induction. Further studies are needed to unravel the molecular mechanisms of VOCs-mediated systemic drought tolerance in plants related to each identified VOC" |
| Keywords: | Droughts Plant Development *Pseudomonas pseudoalcaligenes *Volatile Organic Compounds Zea mays; |
| Notes: | "MedlineYasmin, Humaira Rashid, Urooj Hassan, Muhammad Nadeem Nosheen, Asia Naz, Rabia Ilyas, Noshin Sajjad, Muhammad Azmat, Ammar Alyemeni, Mohammed Nasser eng RSP-2020/180/King Saud University, Riyadh, Saudi Arabia/ Denmark 2020/12/15 Physiol Plant. 2021 Jun; 172(2):896-911. doi: 10.1111/ppl.13304. Epub 2021 Jan 5" |
