Ma C, Wang L, Lee U Y, Tanabe K, Kang S, Zhang C X
Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
Lab of Horticultural Science, Faculty of Agriculture, Tottori University, Tottori, Japan.
Genet Mol Res. 2016 Dec 23;15(4):gmr-15-04-gmr.15049339. doi: 10.4238/gmr15049339.
To identify the roles of ethylene in fruit development in Japanese pear Pyrus pyrifolia 'Niitaka', one of the non-climacteric genotypes, source-sink strength and fruit development during fruit expansion were investigated when ethephon was applied after a conventional gibberellic acid (GA) lanolin paste treatment on the pedicel. The results demonstrate that the conventional GA treatment during the early stage of fruit expansion resulted in larger fruit size and advanced fruit maturation, but pre-harvest foliar application of ethephon only advanced fruit maturation. However, pre-harvest foliar application of ethephon with a preceding conventional GA treatment during the early stage of fruit expansion dramatically improved fruit size and advanced fruit maturation over GA or ethephon alone. Moreover, the early foliar application of ethephon showed a better efficacy in increasing fruit size than the late spraying. A further study revealed that when ethephon was applied after the conventional GA treatment, it improved source-sink strength associated with leaf photosynthesis and the specific rate of [C] accumulation in fruit, and also strengthened cell expansion more than did GA or ethephon alone.
为了确定乙烯在非跃变型基因型之一的日本梨（Pyrus pyrifolia 'Niitaka'）果实发育中的作用，在花梗上进行常规赤霉素（GA）羊毛脂膏处理后施用乙烯利时，研究了果实膨大期间的源库强度和果实发育情况。结果表明，在果实膨大早期进行常规GA处理可使果实更大且提前成熟，但采前叶面喷施乙烯利仅能提前果实成熟。然而，在果实膨大早期先进行常规GA处理，然后采前叶面喷施乙烯利，与单独使用GA或乙烯利相比，能显著改善果实大小并提前果实成熟。此外，乙烯利早期叶面喷施在增加果实大小方面比后期喷施效果更好。进一步研究表明，在常规GA处理后施用乙烯利，与叶片光合作用相关的源库强度以及果实中[C]的积累速率均得到改善，并且比单独使用GA或乙烯利更能增强细胞膨大。
