盐胁迫对二色补血草根系活力的影响

目的]研究不同浓度盐处理下二色补血草的根系活力的变化,为植物的抗盐性研究提供基础。方法]分别利用0、100、200、400mmol/L NaCl处理盐生植物二色补血草,14 d后各组分别取5棵植物测定其根系生长量、根系活力等生理指标。结果]随着盐浓度的升高,二色补血草根系干鲜重、总长度、表面积、根尖数、总体积及根系活力均先升高后降低,最大值出现在100 mmol/L NaCl处理组;根系平均直径的最大值出现在200 mmol/L NaCl处理。在高浓度的盐胁迫下二色补血草根系的总长度、表面积、平均直径、总体积、根尖数、鲜重和干重均显著地受到抑制。结论]二色补血草根系对盐胁迫有一定的应激能力,在低浓度的盐胁迫下能够保持较高的活力,但随着盐胁迫的加重,根系活力下降。

Effects of Salt Stress on Root Activity of Limonium bicolor(Bunge) Kuntze

Objective] The study aimed to research the change of root activity of Limonium bicolor(Bunge) Kuntze under the treatments of different salt concn.,so as to provide the foundation for the study on the salt resistance of plant.Method] The halophilous plant L.bicolor was treated with NaCl at 0,100,200 and 400 mmol/L,resp.After 14 d,5 plants were taken from each treatment group to determine their physiological indexes such as the root biomass and root activity of the seedlings.Result] With the increasing of ...