After 33 days of drought stress treatments, when compared with control, P N , G s and E of LS, MS and SS plants decreased 28%, 57% and 87% (LS); 56%, 69% and 84% (MS) and 47%, 65% and 78% (SS), respectively. Unlike the three parameters above, C i of LS and MS plants went down after 5 days of treatment and showed a trend of increasing over time.
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Effects of drought stress on photosynthesis and photosynthetic electron transport chain in young apple tree leaves.
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