摘要
以三叶期的水稻幼苗为材料，研究了干旱（－０．６ ＭＰａ ＰＥＧ模拟）、盐（ ０． １５ ｍｏｌ／Ｌ ＮａＣ１）和低 温（６℃）胁迫下，不同水稻品种脯氨酸积累的变化。结果表明，干旱、盐和低温胁迫下稻苗均可积 累脯氨酸，且随着胁迫时间的延长而加剧。在同一胁迫条件下，耐性强的品种脯氨酸积累较少，而敏 感品种脯氨酸积累则较多。脯氨酸的积累不宜作为稻苗抗逆性的筛选指标。
Drought, salt and chilling effects on proline accumulation were studied in 3-leaf-stage seedlings of three rice (Oryza sativa L.) varieties: IAC (sensitive to drought and salt, and tolerant to low temperature), Dahuanggu (salt-resistant but sensitive to low temperature) and Guixi (drought-tolerant). Treatments were carried out at -0.6 MPa PEG (simulation) for drought, 0.15 mol/L NaC1 for salinity, and 6 ℃ for chilling stresses. Proline content in aboveground part of rice seedlings were tested. The results showed that proline accumulation in rice seedlings of various varieties was seen under all stresses, and the proline content increased with increasing time of stress. Sensitive variety accumulated more proline content than tolerant one. It seems, however, that proline accumulation can not be used as a screening index of resistance to stresses in rice seedlings.
出处
《热带亚热带植物学报》
CAS
CSCD
2000年第3期235-238,共4页
Journal of Tropical and Subtropical Botany
基金
广东省自然科学基金
农业部"九五"高新技术及基础研究项目资助
关键词
水稻幼苗
脯氨酸
干旱胁迫
盐胁迫
低温胁迫
Rice seedling, Proline
Drought stress
Salt stress, Chilling stress
