Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysore 570006, Karnataka, India.
Department of Epidemic Disease Research, Institutes for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia.
Int J Mol Sci. 2021 Oct 24;22(21):11461. doi: 10.3390/ijms222111461.
Soil salinity stress has become a serious roadblock for food production worldwide since it is one of the key factors affecting agricultural productivity. Salinity and drought are predicted to cause considerable loss of crops. To deal with this difficult situation, a variety of strategies have been developed, including plant breeding, plant genetic engineering, and a wide range of agricultural practices, including the use of plant growth-promoting rhizobacteria (PGPR) and seed biopriming techniques, to improve the plants' defenses against salinity stress, resulting in higher crop yields to meet future human food demand. In the present review, we updated and discussed the negative effects of salinity stress on plant morphological parameters and physio-biochemical attributes via various mechanisms and the beneficial roles of PGPR with 1-Aminocyclopropane-1-Carboxylate(ACC) deaminase activity as green bio-inoculants in reducing the impact of saline conditions. Furthermore, the applications of ACC deaminase-producing PGPR as a beneficial tool in seed biopriming techniques are updated and explored. This strategy shows promise in boosting quick seed germination, seedling vigor and plant growth uniformity. In addition, the contentious findings of the variation of antioxidants and osmolytes in ACC deaminase-producing PGPR treated plants are examined.
土壤盐胁迫已成为全球粮食生产的严重障碍，因为它是影响农业生产力的关键因素之一。预计盐度和干旱会导致大量作物减产。为了应对这一困境，已经开发了多种策略，包括植物育种、植物基因工程和各种农业实践，包括使用植物促生根际细菌（PGPR）和种子生物引发技术，以提高植物对盐胁迫的防御能力，从而提高作物产量，以满足未来人类的粮食需求。在本综述中，我们通过各种机制更新并讨论了盐胁迫对植物形态参数和生理生化特性的负面影响，以及具有 1-氨基环丙烷-1-羧酸（ACC）脱氨酶活性的 PGPR 的有益作用，作为减轻盐渍条件影响的绿色生物接种剂。此外，还更新和探讨了 ACC 脱氨酶产生的 PGPR 在种子生物引发技术中的应用。这项策略有望促进快速种子萌发、幼苗活力和植物生长均匀性。此外，还研究了在 ACC 脱氨酶产生的 PGPR 处理的植物中抗氧化剂和渗透物变化的有争议的发现。
