Krishna Ram, Ansari Waquar Akhter, Altaf Mohammad, Jaiswal Durgesh Kumar, Pandey Sudhakar, Singh Achuit Kumar, Kumar Sudhir, Verma Jay Prakash
ICAR-Indian Institute of Vegetable Research, Jakhini, Varanasi 221305, Uttar Pradesh, India.
Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India.
Life (Basel). 2024 Oct 18;14(10):1333. doi: 10.3390/life14101333.
Drought is the most important abiotic stress that restricts the genetically predetermined yield potential of the crops. In the present study, four tomato varieties: Kashi Vishesh, Kashi Aman, Kashi Abhiman, and Kashi Amrit, were used to study the effect of PGPMs (plant growth-promoting microorganisms). PGPM strains, BHUPSB14, BHUPSB06, BHUPSB01, BHUPSB0, BHUPSB17, and , were used as the consortium. The control group was irrigated up to 80% of field capacity, while 7-, 14-, and 21-day water-deficit-exposed (DWD) plants' pot soil moisture was maintained to 40, 25, and 15% of the field capacity, both with and without the PGPM inoculation condition. The physiological parameters, such as electrolyte leakage, relative water content, photosynthetic efficiency, and chlorophyll color index, were significantly improved by PGPM application under progressive drought stress, compared to the control. PGPM application enhanced the proline accumulation and reduced the formation of hydrogen peroxide and lipid peroxidation under drought stress. The plant growth attributes were significantly increased by PGPM application. The Kashi Amrit variety showed the highest fruit yield among the four varieties under all the treatments. The PGPM consortium application also improved the soil physico-biological properties and nutrient availability in the soil. The PGPM consortium used in this study can potentially mitigate drought stress on tomato in drought-prone regions and act as a biofertilizer. The present study will open a new avenue of drought stress management in tomato.
干旱是限制作物遗传预定产量潜力的最重要非生物胁迫。在本研究中，使用了四个番茄品种：卡西维舍什、卡西阿曼、卡西阿比曼和卡西阿姆里特，来研究植物生长促进微生物（PGPMs）的作用。PGPM菌株BHUPSB14、BHUPSB06、BHUPSB01、BHUPSB0、BHUPSB17和 被用作组合。对照组灌溉至田间持水量的80%，而在接种和未接种PGPM的条件下，7天、14天和21天水分亏缺处理（DWD）的植株盆栽土壤湿度分别维持在田间持水量的40%、25%和15%。与对照相比，在渐进干旱胁迫下，施用PGPM显著改善了电解质渗漏、相对含水量、光合效率和叶绿素颜色指数等生理参数。施用PGPM可增强脯氨酸积累，并减少干旱胁迫下过氧化氢的形成和脂质过氧化。施用PGPM显著提高了植物生长特性。在所有处理下，卡西阿姆里特品种在四个品种中果实产量最高。施用PGPM组合还改善了土壤物理生物学性质和土壤养分有效性。本研究中使用的PGPM组合有潜力减轻干旱易发地区番茄的干旱胁迫，并作为生物肥料。本研究将为番茄干旱胁迫管理开辟一条新途径。
