Wang J, Wang Y L, Wang D Y, Huang J X, Liu Y B, Zhu M, Li F H
College of Agronomy, Specialty Corn Institute, Shenyang Agricultural University, 110866 Shenyang, Liaoning Province, China.
Photosynthetica. 2022 Jun 21;60(3):389-399. doi: 10.32615/ps.2022.027. eCollection 2022.
6-Benzyladenine (6-BA) is an artificial synthetic cytokinin, which plays an important role in regulating plant responses to abiotic stress. This study aimed to investigate the mitigative effect of exogenous 6-BA on photosynthetic capacities and leaf ultrastructure under waterlogging stress using two waxy corn inbred lines. The results showed that waterlogging stress disrupted the photosynthesis of waxy corn seedlings. However, exogenous 6-BA alleviated the inhibition caused by waterlogging stress. Under the waterlogging conditions, 6-BA treatment of plants helped preserve the structural integrity of the chloroplasts and retain higher contents of photosynthetic pigments. It also increased the photosynthetic capacity and promoted the openness of stomatal pores. Moreover, exogenous 6-BA promoted photosynthetic activities and the accumulation of carbohydrates. The results revealed that the detrimental effects of waterlogging stress on maize seedlings can be alleviated by 6-BA modulating photosynthetic activities.
6-苄基腺嘌呤（6-BA）是一种人工合成的细胞分裂素，在调节植物对非生物胁迫的响应中发挥着重要作用。本研究旨在利用两个糯玉米自交系，研究外源6-BA对渍水胁迫下光合能力和叶片超微结构的缓解作用。结果表明，渍水胁迫破坏了糯玉米幼苗的光合作用。然而，外源6-BA减轻了渍水胁迫造成的抑制作用。在渍水条件下，用6-BA处理植株有助于保持叶绿体的结构完整性，并保持较高的光合色素含量。它还提高了光合能力，促进了气孔的开放。此外，外源6-BA促进了光合活性和碳水化合物的积累。结果表明，6-BA通过调节光合活性可以减轻渍水胁迫对玉米幼苗的有害影响。
