低温胁迫对紫花苜蓿越冬芽组织显微结构的影响  

The effect of low temperature stress on tissue microstructure of Alfalfa overwintering bud

作　　者：李小安 尹卫[1,2] 杨国柱 宋雪梅[3] 田海宁 熊丽丽[1,2] 严晓霞[1,2] 

机构地区：[1]青海大学生态环境工程学院,西宁810016 [2]青海大学生态环境工程研究中心,西宁810016 [3]湟中县林业局多巴国营苗圃,湟中811601

出　　处：《黑龙江畜牧兽医》2017年第9期164-167,295,共5页Heilongjiang Animal Science And veterinary Medicine

基　　金：国家科技部农业科技成果转化项目(2014GB2G200063);青海省科技厅项目(2016-NK-140;2015-ZJ-713)

摘　　要：为了探究青藏高原地区独特的气候条件下青大1号紫花苜蓿新品系低温胁迫下组织显微结构变化,试验通过显微结构观测,探索冷胁迫下青大1号紫花苜蓿新品系越冬芽组织结构变化情况。结果表明:随着胁迫时间的逐渐延长,新品系紫花苜蓿越冬芽组织结构越发紊乱,外表皮出现破裂现象,部分细胞壁结构出现明显变形;在-20℃处理24 h,部分紫花苜蓿越冬芽组织细胞核及细胞器即出现解离现象。The aim of this experiment was to explore the effect of low temperature stress on tissue microstruetaral changes of the new line Qingda No. 1 Alfalfa under the special climate conditions in Qinghai - Tibet Plateau area. The observation method of microstructure was employed in this experiment to research bud tissue structural changes of the new line Qingda No. 1 Alfalfa under low temperature stress. The results indicated that the more cold stress time increased, the more disordered tissue microstructure of overwintering bud of the new line Alfalfa got. Outer skin happened to fracture phenomena and obvious distortion was found in the structure of partial cell walls. After a 24 h treatment at - 20℃, dissociation phenomena appeared in the cell nucleug and other organelles of part of overwintering bud of Alfalfa.

关 键 词：低温胁迫 青大1号紫花苜蓿 越冬芽 组织显微结构 解离现象 

分 类 号：S551.7[农业科学—作物学]