Mitigative effect of 6-benzyladenine on photosynthetic capacity and leaf ultrastructure of maize seedlings under waterlogging stress

Abstract

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 via modulating photosynthetic activities. Highlights• Two waxy corn inbred lines were used in this study • Exogenous 6-BA improved photosynthetic capacity and leaf ultrastructure • Exogenous 6-BA alleviated the waterlogging-induced damages of waxy corn seedlings

Effect of Glutamic Acid and 6-benzylaminopurine on Flower Bud Biostimulation, Fruit Quality and Antioxidant Activity in Blueberry

“…Our findings indicate that in blueberry there is an increase in chlorophyll a by the application of 6-BAP and a significant increase in chlorophyll a and b and total chlorophyll by the interaction of GLU*6-BAP at higher concentrations ( Table 4 ); these results agree with those reported by El-Metwally et al [ 45 ], as the application of 20 mg L −1 GLU increased the content of chlorophyll a and b and total chlorophyll in peanuts. In contrast, Franzoni et al [ 64 ] and Wang et al [ 33 ] reported that applying GLU and 6-BAP had no positive effect on the chlorophyll content in and yield of lettuce and maize.…”

“…Cytokinins such as 6-BAP are plant hormones involved in growth and development, the regulation of cell division processes, the delay in senescence, and the regulation of apical dormancy [ 24 , 25 ]. It was reported that the application of 6-BAP in selected crops favors the production of buds [ 26 , 27 ] and the generation of roots and flowers [ 28 , 29 ], in addition to the removal of reactive oxygen species [ 30 , 31 , 32 , 33 ].…”