Nitric Oxide Participates in Aluminum-Stress-Induced Pollen Tube Growth Inhibition in Tea (Camelliasinensis) by Regulating CsALMTs.

ABSTRACT: Nitric oxide (NO), as a signal molecule, is involved in the mediation of heavy-metal-stress-induced physiological responses in plants. In this study, we investigated the effect of NO on Camellia sinensis pollen tubes exposed to aluminum (Al) stress. Exogenous application of the NO donor decreased the pollen germination rate and pollen tube length and increased the malondialdehyde (MDA) content and antioxidant enzyme activities under Al stress. Simultaneously, the NO donor effectively increased NO content in pollen tube of C. sinensis under Al stress and could aggravate the damage of Al³⁺ to C. sinensis pollen tubes by promoting the uptake of Al³⁺. In addition, application of the NO-specific scavenger significantly alleviated stress damage in C.

SUBMITTER: Xu X 

PROVIDER: S-EPMC9460577 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature