摘要
用盆栽土培试验研究4个蕹菜(Ipomoea aquatica Forsk.)Cd积累典型品种的根系形态学指标及与Cd吸收积累的关系.结果表明:品种和土壤对根系形态学各指标的效应均极显著(P<0.01).与non-Cd-PSC比较,蕹菜Cd-PSC总根长、平均直径、根总表面积及总体积均较低(P<0.001);总体积的差异最大(47.37%),总根长(44.50%)、总表面积(43.05%)的差异次之,平均直径的差异最小(7.71%);2类品种的差异主要体现在直径>1.0 mm的粗根上,蕹菜典型品种的根系形态学特征在不同土壤上表现稳定,可能影响根系吸收Cd的能力和Cd在体内的转运能力.
Pot experiments were carried out to investigate root morphology of four typical cultivars of water spinach （Ipomoea aquatica Forsk. ）involved in Cd accumulation. The results show that the effects of cultivars and soils on the root morphological parameters are all significant （P 〈 0. 01 ）. Compared to non - Cd - PSCs, Cd - PSCs have the following characteristics. Total root length, average diameter, total surface area and total volume are all rela- tively low; the difference between cuhivars in total volume is the biggest （47.37%）, followed by total root length and total surface area （44. 50% and 43.05%, respectively）, and average diameter is the smallest （7. 71% ） ; the parameters of different diameter are all relatively low; the differences in root length, surface area and volume be- tween cultivars are mainly reflected at D 〉 1.0 mm roots. Our results indicated that the root quantity of Cd - PSCs is relatively low. The root morphological characteristics Of the typical cultivars are consistent under different soils and might affect both the capacity of Cd uptake from soil to root, and the capacity of Cd translocation within plants.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2012年第3期100-106,共7页
Journal of South China Normal University(Natural Science Edition)
基金
国家自然科学基金项目(20877104)
