酸雨对不同抗性植物种子萌发过程的影响Ⅱ——酸雨短程胁迫时间对植物种子4项萌发生理指标的影响  

Effects of Acid Rain on Seed Germination of Three Plants Under Time Stress

作　　者：曾庆玲[1] 黄晓华[2] 周青[1] 

机构地区：[1]江南大学工业生物技术教育部重点实验室,江苏无锡214062 [2]南京师范大学化学与环境科学学院,江苏南京210097

出　　处：《农业环境科学学报》2005年第1期35-38,共4页Journal of Agro-Environment Science

基　　金：国家计委基金(GJX01100626);江苏省科技厅基金(BG2001045)

摘　　要：以pH2.5、3.0、3.5、4.0的模拟酸雨处理水稻、小麦和油菜种子,研究了酸雨胁迫时间对3种植物种子萌发贮藏物质消耗率、贮藏物质运转率、根长抑制指数和芽长抑制指数的影响。结果表明,随酸雨胁迫时间的延长,水稻、小麦贮藏物质消耗率降低,油菜则增加,贮藏物质运转率皆降低;3类种子根长和芽长抑制指数都随酸雨胁迫时间的延长而增加,达到差异显著性的胁迫时间是水稻>小麦>油菜。说明3类种子萌发耐酸雨胁迫能力存在明显差异,表现为水稻>小麦>油菜。The responses of seed germination subject by acid rain using rice (O. sativa), wheat (T. aestivum) and rape (B.chinensis var. oleifera) seeds were investigated in our test. Four simulated acid rain (SAR) solutions with pH 2.5, 3.0, 3.5 and 4.0, respectively, and neutral solution (pH6.5) as control were conducted in the present study. In addition, the loss (transformation) rates duringstorage period and inhibition index of root (shoot) length were measured under the acid rain stress in our experiment. The results indicated that the storage reserve loss (transformation) rates of rice and wheat decreased with prolonged stress days at a certain acidity levels. In contrast, the storage reserve transformation rate of rape decreased and the storage reserve loss rate increased. The inhibition indexes of root (shoot) length for the 3 kinds of seeds increased withprolonged stress days at the certain acidity levels. The stress time when significant difference of each index above was perceptible between treatment groups was that rice>wheat>rape. The storage reserve loss (transformation) rate of rice and wheat was increased in relation with decreased acidity levels in the identical stress time. The storage reserve transformation rate of rape increased and the storage reserve loss rate decreased with decreased acidity levels. The inhibition indexes of root (shoot) length of 3 kinds of seeds decreased with decreased acidity levels. The experiment data further evidenced that plants could display different sensitivity under acid rain stress, in which rice had stronger resistance than wheat, and rape was more susceptible to acid rain than rice and wheat.

关 键 词：酸雨 水稻 小麦 油菜 种子萌发 胁迫时间 

分 类 号：X132[环境科学与工程—环境科学]