不同光质对葡萄试管苗根系生长的影响

 以生根能力不同的葡萄试管苗双芽茎段为试验材料, 研究不同光质对其根系产生和生长的效应。结果表明, 所有处理在接种后前5 d均无根产生; 易生根品种矢芙罗莎和森田尼无核在白光、黑暗、红光和黄光条件下的生根时间主要在第6～10天; 绿光和蓝光下处理5 d后在白光下生长的试管苗生根数最多, 当处理超过5 d时, 生根明显受到抑制; 在4种单色光和黑暗中随处理时间延长根长逐渐变短, 根鲜样质量逐渐降低。难生根品种藤稔和皇家秋天在黑暗、红光和黄光条件下处理10 d, 根长和根鲜样质量达最大值, 而后随处理时间的延长根长变短, 根鲜样质量下降, 在绿光和蓝光下根长和根鲜样质量均随处理时间延长而下降。由此说明短波光不利于葡萄试管苗生根和生长, 长波光有利于难生根的试管苗的生根。

Effects of Different Light Qualities on Root Growth and Development of Test-tube Plantlets of Vitis vinifera L.

Effects of different light qualities on the root growth and development of grape test-tube plantlets ofwhich were capable of different rootingswere studied. The results indicated that all of treatments didn't initiate to root the first five days after inoculating. The rooting fastigium of‘Yatomi Rosa’and ‘CentennialSeedless’of easy rootingwas from the sixth day to the tenth day underwhite light, red light, yellow light and the darkness. And their root numbers reached the maximum under white light after inoculating for five days under green and blue light respectively, butwhen theywere inoculated beyond five days under green and blue light, their rooting obviously restrained. W ith p rolonging the inoculating time under four homochromous lights and darkness conditions, their root fresh mass decreased. The root length and fresh mass of‘Fujiminori’and‘Autumn Royal’of difficult rooting treated for ten days under red, yellow light and the dark conditions reached the maximum, then with prolonging the inoculating time, their root fresh mass decreased. But their root fresh mass and root length decreased under green and blue lights. So the conclusion was drawn that the lonwave light was benefit to the root growth and development, but the short-wave light was on the contrary.