The change in parameters including W_k, RC_QA, <i>φ</i>_Po, <i>φ</i>_Eo and <i>ψ</i>_Eo involved in electron transport chain of PSII in bean (<i>V. faba</i> L.) source leaves at 1300 h from the 1^st to 21^st day after removing the sink of roots and pods.

<p>Each value represents the mean of five replicates, and error bars represent ± S.E. The asterisks *, ** and *** indicate significant difference at <i>P</i><0.05, 0.01 and 0.001 between the control and treatment, respectively.