College of Life Sciences, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun, Jilin, China.
PLoS One. 2022 Sep 6;17(9):e0273459. doi: 10.1371/journal.pone.0273459. eCollection 2022.
Promoting the growth of plants and improving plant stress-resistance by plant growth-promoting microorganism increasingly become a hotpot. While, most researchers focus on their supply role of nutrition or plant hormone. In this study, a novel mechanism that phosphate solubilizing microorganisms promoted plant growth under saline-alkali stress through secretion of organic acids, was proposed. The effects of desulfurization gypsum, humic acid, organic fertilizer and phosphate-solubilizing microorganism Penicillium funicuiosum P1 (KX400570) on the growth of quinoa (Chenopodium quinoa cv. Longli 1), showed that the survival rate, stem length and dry weight of quinoa treated with P1 were 2.5, 1.5, 1 and 1.5 times higher than those of sterile water (CK) under severe saline-alkali stress. The growth-promoting effect of P1 on quinoa was much better than that of other treatment groups. In addition, P1 promoted the growth of quinoa because the organic acids (malic acid, citric acid, succinic acid, etc.) from P1 stimulated the antioxidant system and promote the photosynthesis of quinoa, further promote quinoa growth.
通过植物促生微生物促进植物生长和提高植物抗逆性日益成为热点。然而，大多数研究人员关注的是它们提供营养或植物激素的供应作用。在这项研究中，提出了一种新的机制，即解磷微生物通过分泌有机酸来促进盐碱性胁迫下植物的生长。脱硫石膏、腐殖酸、有机肥和解磷微生物 Penicillium funicuiosum P1（KX400570）对藜麦（Chenopodium quinoa cv. Longli 1）生长的影响表明，在严重盐碱性胁迫下，用 P1 处理的藜麦的存活率、茎长和干重分别比无菌水（CK）高 2.5、1.5、1 和 1.5 倍。P1 对藜麦的促生效果明显优于其他处理组。此外，P1 促进了藜麦的生长，因为 P1 中的有机酸（苹果酸、柠檬酸、琥珀酸等）刺激了藜麦的抗氧化系统，促进了藜麦的光合作用，进一步促进了藜麦的生长。
