^(60)Co-γ辐射对3株南山茶种子发芽及幼苗生长的影响  

Effects of ^(60)Co-γ Radiation on Seed Germination and Seedling Growth of Three Strains of Camellia semiserrata

作　　者：查钱慧[1] 金俊[1] 杨亚慧[1] 龚海光[1] 黄永芳[1] 

机构地区：[1]华南农业大学林学与风景园林学院/广东省森林植物种质创新与利用重点实验室,广东广州510642

出　　处：《河南农业科学》2015年第10期61-64,72,共5页Journal of Henan Agricultural Sciences

基　　金：广东省林业科技创新项目(2013KJCX009-05);广东省农业攻关项目(2011B02032003);广东省教育部产学研结合项目(2012B091100090)

摘　　要：为了探究60Co-γ辐射对不同南山茶优树种子发芽和幼苗生长的影响,选取3株南山茶优树种子分别进行0(对照)、10、20、30 Gy60Co-γ辐射处理。结果表明:增城1号种子经10 Gy辐射,其种子发芽率和幼苗成活率分别为29.00%和5.00%,11月苗高为16.56 cm,均为4个处理中最低值;东莞5号和广宁2号则表现为30 Gy辐射组成活率、苗高、叶片生长指标居4个处理中最低;增城1号20、30 Gy辐射组叶绿素含量均高于对照组,而东莞5号和广宁2号则表现为辐射组叶绿素含量均低于对照组。对增城1号发芽及生长抑制作用最强的辐射剂量为10 Gy,对东莞5号、广宁2号发芽及生长抑制作用最强的为30 Gy,表明3株南山茶优树对60Co-γ辐射的响应不完全一致。In order to explore the influence of 60Co-Y radiation on different trees of Camellia semiserrata including germination and seedling growth,the seeds of three strains of Camellia semiserrata were irradia- ted by 60Co-Y radiation of 0 Gy,10 Gy,20 Gy and 30 Gy respectively. The result showed that the germina- tion rate, survival rate and seedling length in November of Camellia semiserrata ＇ Zengcheng No. 1 ＇ of 10 Gy group were 29.00% ,5.00% and 16.56 cm respectively,which were the lowest of the four groups. In the contrary,the survival rate, seedling length and leaf index of Camellia semiserrata ＇ Dongguan No. 5 ＇ and ＇ Guangning No. 2＇ of 30 Gy group were the lowest of the four groups. The chlorophyll contents of Camellia semiserrata ＇ Zengcheng No. 1 ＇ in higher radiation groups（20 Gy and 30 Gy） were higher than the control group, but the chlorophyll contents of Camellia semiserrata ＇ Dongguan No. 5 ＇ and ＇ Guangning No. 2＇ of the control group were higher than the radiation groups. The radiation dose showing strongest in- hibition to germination and growth of Camellia semiserrata ＇ Zengcheng No. 1 ＇ was 10 Gy,but to Camellia semiserrata ＇ Dongguan No. 5 ＇ and ＇ Guangning No. 2 ＇ was 30 Gy. It suggested that the reaction of three strains of Camellia semiserrata to the 60Co-Y radiation was inconsistent.

关 键 词：南山茶 60Co-1辐射 发芽率 苗高 叶片生长 叶绿素含量 

分 类 号：S794.4[农业科学—林木遗传育种]