Effect of shoot vigor on the development of transmitting tissue and pollen tube growth in pistils of tetraploid grape, Cv. Pione

摘要

Effects of shoot vigor on the development of transmit ting tissue (TT) and pollen tube growth in pistils of Pione grapevines (a hybrid of Vitis vinifera L. and V. Labrusca L., tetraploid) were investigated anatomically. Shoot vigor was reduced by root zone restriction and pre-bloom shoot tip- ping, and was increased by severe winter pruning and ap- plication of high concentration fertilizer. The TT develop- ment in ling and short shoots of the vines without root restriction was also compared.