摘要
以辣椒幼苗为试验材料,分别喷施不同浓度亚精胺、壳聚糖、水杨酸、CaCl2、甜菜碱溶液,采用昼温/夜温为10℃/5℃低温胁迫5天后进行相对电导率、冷害指数、可溶性糖含量、脯氨酸含量、丙二醛(MDA)含量等指标的测定和分析,探讨外源物质对低温胁迫下辣椒幼苗的影响及作用效果。结果表明,适宜浓度的外源物质可以显著降低辣椒幼苗低温胁迫后的相对电导率、冷害指数和MDA的积累量,提高可溶性糖、脯氨酸等渗透调节物质的含量,对提高辣椒幼苗抗冷性有积极作用。亚精胺、壳聚糖、水杨酸、CaCl2、甜菜碱提高辣椒幼苗抗冷性的最佳诱导浓度分别为0.5 mmol/L、50 mg/L、2 mmol/L、10 mmol/L、10 mmol/L。
The author selected the pepper seedlings as the experimental material, different concentration of spermidine, chitosan, salicylic acid, CaC12, betaine solution were sprayed respectively, and then relative conductivity, chilling injury index, soluble sugar content, proline content, malondialdehyde （MDA） content were measured and analyzed after 5 days under the day temperature/night temperature 10℃/5% low temperature stress, this paper discussed the effect of exogenous substances on pepper seedlings in low temperature stress. The results indicated that appropriate concentration of exogenous substances produced positive influence on improving cold resistance of pepper seedlings by reducing relative conductivity, chilling injury index, accumulation of MDA and increasing the osmotic regulation substances content such as soluble sugar and proline. The optimal concentrations of spermidine, chitosan, salicylic acid, CaCI2, betaine to improve chilling resistance were 0.5 mmol/L, 50 mg/L, 2 mmol/L, 10 mmol/L, 10 mmol/L.
出处
《中国农学通报》
CSCD
2013年第25期87-92,共6页
Chinese Agricultural Science Bulletin
基金
新疆维吾尔自治区"十二五"重大专项资助项目"新疆设施农业产业高效持续发展关键技术研究与示范"(201130104-2-1)
关键词
外源物质
辣椒幼苗
抗冷性
exogenous substance
pepper seedlings
chilling resistance
