Synergistic Effect of AlCl3 and Kinetin on Chlorophyll and Protein Contents and Photochemical Activities in Detached Wheat Primary Leaves during Dark Incubation

Al³⁺ in combination with kinetin showed more protection against degradation of chlorophyll (Chl) and protein than Al³⁺ or kinetin alone during dark-induced senescence in wheat primary leaf segments. MV-dependent whole chain electron transport, photosystem (PS) 2 mediated oxygen evolution, and PS1 activities were also delayed to a greater extent. Absorbed excitation energy distribution was more in favour of PS1 in Al³⁺ plus kinetin-treated leaf thylakoids at 72 h.