
Effects of water stress on physiology and dry matter accumulation of flax (Linum usitatissimum L.) seedling
DENG Xin, CHEN Xin-Bo, LONG Song-Hua, QIU Cai-Sheng, GUO Yuan, HAO Dong-Mei, WANG Yu-Fu*
CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2015, Vol. 37 ›› Issue (6) : 846.
Effects of water stress on physiology and dry matter accumulation of flax (Linum usitatissimum L.) seedling
To better understand the physiology of different flax varieties on tolerance to water stress, both drought and waterlogging effects were investigated on seedling development. Seedlings from 4 cultivars at the 10th day after sowing were treated by drought and waterlogging stresses with coconut powder medium seedling tray in a constant temperature condition for 12d. Result showed that drought increased root growth, inhibited stem and leaf growth. In contrast, by waterlogging, leaf chlorophyll was dramatically reduced. Leaf chlorophyll was increased by short-turn drought but decreased by long-turn drought. Proline content of flax leaves increased continuously with increasing time after drought and waterlogging stresses, and drought stress led to more proline in leaves than that of waterlogging. Both drought and waterlogging increased SOD and POD contents in leaves initially and then decreased, but malonic aldehyde content continuously increased. Different flax cultivar had different level of water stress tolerance. Among them, Zhongyama 1 was the most tolerant and Agatha was the least tolerant.
Water stress / Physiological characteristics / Dry matter accumulation {{custom_keyword}} /
/
〈 |
|
〉 |