supported by Chinese National Key R&D Program(Grant No.2016YFD0201118);Shanxi Province Key R&D Program(Grant No.201903D211001-24-1);Agricultural Sci-Tech Innovation Project Program of Shanxi Academy of Agricultural Sciences(Grant No.YGC2019TD08-2);Agricultural Sci-Tech Innovation Research Program of Shanxi Academy of Agricultural Sciences(Grant Nos.YCX2020402,YCX2020302);Prior Support Program of Shanxi Academy of Agricultural Sciences(Grant No.YCX2018D2YS04)。
Although open-central canopy(OCC)is popular in apple(Malus×domestica)orchards in Loess Plateau of China,its relevant photosynthetic mechanisms have not been elucidated.In this study,changes in photosynthetically acti...