森林与环境学报2026，Vol.46Issue(3)：244-251,8.DOI:10.13324/j.cnki.jfcf.202510016
137Cs-γ射线对不同杉木家系种子萌发及幼苗生长指标的影响
Effects of 137 Cs-γ radiation on seed germination and seedling growth in different families of Chinese fir
摘要
Abstract
To investigate the effects of 137 Cs-γ radiation on seed germination and early seedling growth of different half-sibling families of Chinese fir,this study used the seeds of 5 half-sibling families of Chinese fir collected from the 3rd-generation seed orchard of Zhangping Wuyi State-Owned Forest Farm of Fujian Province as test materials.Radiation doses were set at 0(CK),25,30,35,40,45,50 Gy,and the suitable radiation dose for the seeds was screened out.The results showed that low-dose 137 Cs-γ radiation promoted seed germination and mutant seedling growth.However,as radiation doses increased,seed germination and early growth of mutant seedlings were inhibited.The initial germination time of seeds prolonged,and the seedling emergence rate showed a continuous downward trend with the increase in radiation dose.The overall effect of radiation on plant height exhibited a promoting effect at medium-to-low doses and an inhibitory effect at high doses.The variation patterns of diameter and branching number in mutant seedlings are consistent with those of plant height.Different Chinese fir families showed varying radiation tolerance.Family 10 was more sensitive,while Family 28 demonstrated stronger resistance.The sublethal dose was determined based on 50%relative seedling emergence rate,within the range of 45.71-70.20 Gy calculated through linear regression analysis.Based on seed germination,seedling emergence,and early growth indicators of mutant seedlings,the optimal radiation dose range for 137 Cs-γ-ray irradiation of Chinese fir seeds was determined to be 30-45 Gy.关键词
杉木/137Cs-γ射线/辐射诱变/种子萌发/幼苗生长Key words
Chinese fir/137 Cs-γ radiation/radiation mutation/seed germination/seedling growth分类
农业科技引用本文复制引用
谢明勋,魏理晖,傅润华,马祥庆,帅鹏..137Cs-γ射线对不同杉木家系种子萌发及幼苗生长指标的影响[J].森林与环境学报,2026,46(3):244-251,8.基金项目
福建省杉木高世代良种创新与产业化工程(2021-2025年)林业项目"杉木高世代良种创新与产业化开发"(ZYCX-LY-2021004) （2021-2025年）
国家自然科学基金项目"杉木miR166e及其靶基因HD-ZIP调控低磷胁迫响应的分子机制"(31971626) （31971626）
福建农林大学科技创新专项基金"杉木低磷响应转录因子调控机制研究"(KFB24067). （KFB24067）
