In this study,'Korla fragrant pear'(Pyrus sinkiangensis)was selected as experimental material,the occurrence pattern and growth dynamics of lopsided fruits were investigated,and the difference of en-dogenous hormone contents between normal fruit and lopsided one was compared.The results show that the lopsidedness of'Korla fragrant pear'was serious at 40-60 d after pollination,and the average daily growth rate of lopsided fruit was 0.335％,which was 0.235％higher than the average level,and the lopsid-ed rate reached two peaks between 30-50 d(0.136％)and 80-100 d(0.152％)after pollination.The differ-ence between the longitudinal diameter of the lopsided fruit size was the largest(4.144 mm)at 140 d after pollination,while the difference in transverse diameter gradually increased after 90 d after pollination,and the difference was the largest(2.112 mm)at 140 d after pollination.The difference of single fruit weight became significant at 40 d after pollination,and the largest difference(6.415 g)was 130 d after pollina-tion.The endogenous hormones of normal fruit and lopsided fruit size reached the maximal value 40 d af-ter pollination,during when the contents of auxin(indole-3-acetic acid,IAA)and gibberellin(GA3)of lopsid-ed fruit surface were significantly lower,respectively,than those of large and normal fruit surfaces.The difference of auxin content reached 355 and 291 ng·g-1,respectively,and the difference of gibberellin con-tent reached 67 and 60 ng·g-1,respectively.On the contrary,the abscisic acid(ABA)content of small fruit surface of lopsided fruit was significantly higher than those of large fruit surface and normal fruit surface,with a difference of 2.011 and 2.006 μg·g-1,respectively.The difference of the content of zeatin(ZT)be-tween different fruit surfaces was small,and it remained at a low level during 20-60 d after pollination.
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NSTL
万方数据
