中国麻业科学2025，Vol.47Issue(1)：36-44,62,10.
低温胁迫下工业大麻幼苗的生理响应
Physiological Responses of Industrial Hemp Seedlings to Low Temperature Stress
摘要
Abstract
Low temperatures is a key factor that limits the geographical distribution of industrial hemp and the yield and quality of hemp seeds.The seed-type industrial hemp variety Longdama No.9 was used as the test material,and its seedlings were treated with low temperature stress at 4℃for 1 to 7 days(25℃as the control).The growth and physiological indicators of industrial hemp seedlings were measured under low temperature stress.The results showed that low temperature stress caused plant bio-mass accumulation and chlorophyll content to decrease,inhibited the growth of industrial hemp,the total fresh weight decreased by 29%to 37%,and the total dry weight decreased by 17%to 22%.With the ex-tension of low temperature stress time,the membrane permeability of hemp seedling leaves increased,and the relative electrical conductivity increased to 75.7%at the 7th day of treatment;the levels of ion permeation and membrane lipid peroxidation intensified,and osmotic regulating substances increased.At the 3rd day of treatment,the soluble protein content was 1.5 times that of the control group.At the 7th day of treatment,the soluble sugar content increased by 75%and the proline content was 1.2 times that of the control group;cellular reactive oxygen species accumulated in the leaves increased;The content of malondialdehyde always increased throughout the treatment period,and the increase rate tended to slow down in the later treatment period,which could alleviate the damage caused by stress to a certain extent.In response to low temperature stress,industrial hemp mainly alleviates the damage caused by low tem-perature stress to plant cells through the increase of osmotic regulating substances and antioxidant enzyme activities.The above provides an important theoretical basis for elucidating the response mechanism of in-dustrial hemp to low temperature stress.关键词
低温/工业大麻/生理指标/响应机制Key words
low temperature/industrial hemp/physiological index/response mechanism分类
农业科学引用本文复制引用
闫博巍,常传义,隋月,张元野,郑楠,房郁妍,张明,张利国..低温胁迫下工业大麻幼苗的生理响应[J].中国麻业科学,2025,47(1):36-44,62,10.基金项目
黑龙江省农业科技创新跨越工程—经济作物突破性新品种选育及产业化应用(GX23GG04) （GX23GG04）
中国博士后科学基金第14批特别资助(2021T140187) （2021T140187）
黑龙江省自然科学基金(LH2024C103) （LH2024C103）
黑龙江省博士后研究人员落户黑龙江科研启动项目 （）
