[关键词]
[摘要]
选择甘肃省不同海拔地区,以国内首个藜麦品种陇藜1号为材料,测定不同海拔对藜麦苗期叶片生理指标的影响。结果表明,随海拔的升高,藜麦叶片的叶绿素、可溶性蛋白和脯氨酸含量先升高后下降;MDA含量和O2-产生速率升高后下降再升高,在海拔最高(2 130 m)处达到最大值;SOD、POD、CAT和APX活性先升高后下降。说明随海拔的升高,藜麦叶片通过积累渗透调节物质和提高抗氧化酶活性,以清除多余的活性氧物质,维持细胞渗透势平衡,缓解环境变化对其生长造成的伤害。
[Key word]
[Abstract]
Longli 1, the first Chenopodium album cultivar in China, was selected as the experimental material to determine the effects of different altitudes on physiological indexes of the leaves at the seedling stage in different altitudes in Gansu Province. The results showed that chlorophyll, soluble protein and proline contents of the leaves increased first and then decreased with the elevation increasing, MDA content and O2- production rate increased, then decreased and increased again, reaching the maximum at the highest elevation (2 130 m), and SOD, POD, CAT and APX activities increased first and then decreased. The results indicated that with the increase of altitude, the leaves accumulated osmotic regulators and increased antioxidant enzymes activities to remove excess reactive oxygen species, maintain the balance of cell osmotic potential, and alleviate the damage caused by environmental changes to its growth.
[中图分类号]
S516
[基金项目]
国家自然基金“不同海拔对藜麦产量和品质的影响及生理生态机制”(31660357)、兰州市科技支撑计划“兰州藜麦新品种选育及栽培加工技术研究与示范”(2017-2-5)、甘肃省农业科学院农业科技创新专项计划“藜麦耐旱种质资源筛选与转录组分析研究”(2017GASS66)、甘肃省青年科技人才托举工程项目“藜麦耐盐种质资源筛选及生理生态应答机制研究”。