摘要
干旱胁迫是抑制甜菜生长发育和影响产量的重要非生物因素。以耐旱型甜菜种质依安一号(V1)和干旱敏感型种质92011/1-6/1(V2)为试验材料,探讨不同耐旱品种甜菜幼苗光合生理对干旱胁迫的响应。研究了干旱胁迫对甜菜幼苗生长发育、总叶绿素含量和表观光合指标的影响。结果表明,干旱胁迫下2种甜菜幼苗的茎粗、根长、株高、叶鲜重、根鲜重、叶干重和根干重均呈下降趋势,V1下降幅度不明显且各指标降低幅度均小于V2;干旱胁迫降低了2种甜菜幼苗的叶绿素含量,叶绿素含量在第7天降到最低,且V1的含量明显高于V2;干旱胁迫使甜菜幼苗的净光合速率、蒸腾速率、叶片气孔导度和胞间CO_(2)浓度显著下降,V1受到的影响比V2要小。不同耐旱性甜菜品种对干旱胁迫的响应机制存在一定差异,可以进一步分析其抗旱能力,为甜菜的育种、抗逆栽培和稳产提供理论依据。
Drought stress is an important abiotic factor that inhibits the growth and development of sugar beet and affects yield. The drought-tolerant sugar beet germplasm Yi’an No.1(V1) and the drought-sensitive germplasm 92011/1-6/1(V2) were used as test materials to investigate the photosynthetic physiological responses of sugar beet seedlings of different drought-tolerant varieties to drought stress. The effects of drought stress on the growth and development, chlorophyll content, and apparent photosynthesis of sugar beet seedlings were investigated. The results showed that the stem diameter, root length, plant height, leaf fresh weight, root fresh weight, leaf dry weight, and root dry weight of the two sugar beet seedlings decreased under drought stress,and the decrease in V1 was less pronounced than V2, and the decrease in V1 was smaller than V2. The net photosynthetic rate, transpiration rate, leaf stomatal conductance and intercellular CO_(2) concentration of sugar beet seedlings were significantly reduced by drought stress, and V1 was less affected than V2. The response mechanisms of different drought-tolerant sugar beet varieties to drought stress were somewhat different, which could further analyze their drought resistance and provide a theoretical basis for breeding, stress-resistant cultivation and stable yield of sugar beet.
作者
尹希龙
石杨
李王胜
兴旺
Yin Xilong;Shi Yang;Li Wangsheng;Xing Wang(National Medium-Term Repository of Sugar Beet Germplasm,Heilongjiang University,Harbin 150080,Heilongjiang,China;College of Modern Agriculture and Ecological Environment,Heilongjiang University,Harbin 150080,Heilongjiang,China)
出处
《作物杂志》
北大核心
2022年第6期152-158,共7页
Crops
基金
国家作物种质资源库“甜菜分库运行服务”(NCGRC-2021-017)
农业农村部“甜菜种质资源的收集、鉴定、编目、繁种与入库(圃)保存”(19210157)
农业农村部“普查收集甜菜种质资源鉴定评价与编目入库”(19210911)
农业农村部“甜菜种质资源安全保存”(19211031)
国家糖料产业技术体系(CARS-170102)
黑龙江省普通本科高等学校青年人才创新培养计划(UNPYSCT-2020014)。
关键词
甜菜
干旱胁迫
光合生理
Sugar beet
Drought stress
Photosynthetic physiology
