不同植物生长调节剂对淮山药叶绿素及淀粉分解转化的影响

Effects of Plant Growth Regulators(combination) on Chlorophyll Content and Amylolysis of Yam

以‘桂淮2号’淮山药为供试品种,以矮壮素(CCC)与羟季铵·萘合剂(氯化胆碱CC+萘乙酸NAA)为供试药剂,探索不同种类及浓度植物生长调节剂(组合)对南方地区淮山药叶绿素含量及淀粉分解转化的影响。结果表明:喷施CCC能延缓叶片叶绿素含量的下降幅度,显著提高叶片淀粉酶活性,有利于光合碳水化合物从源(叶片)向库(块茎)转移。喷施CCC 1750、2250 mg·L^(-1)及羟季铵·萘合剂(CC 225 mg·L^(-1)+NAA 20 mg·L^(-1))均可提高淮山药块茎膨大末期鲜薯ADPG焦磷酸化酶活性,有利于鲜薯淀粉合成及产量提高,相互之间有正向相关关系。

This study was carried out to research the effects of different plant growth regulators（ combination） on chlorophyll content and amylolysis of yam（ Dioscorea opposita Thunb.） in South China. Plant growth regulators,viz. chlormequat chloride（ CCC） and CC（ choline chloride） ＋ NAA（ naphthalene acetic acid） were applied. Yam variety Guihuai 2 was used as the control in this study. The results showed that spraying CCC at concentration of 2250 mg / L could slow down the decrease of chlorophyll content in leaves,significantly improve amylase activity and promote the transfer of carbohydrates from the leaves to tubers. Spraying CCC at concentration of 1750,2250 mg / L and CC 225 mg·L^（-1）＋ NAA 20 mg·L^（-1） could enhance the activity of ADPG pyrophosphorylase at the late stage of tuber expansion and improve yam yield and amylolysis. Positive relations were observed.