荞麦边缘细胞对铝毒害的响应

摘要

以江西荞麦(耐铝基因型)和内蒙荞麦(铝敏感基因型)为材料,采用悬空气培养法,研究Al3+时荞麦相对根长、原位和离体边缘细胞活性、黏液分泌量的影响.结果表明,AP"降低荞麦相对根长和边缘细胞活性.相同Al3+浓度处理下,附着于根尖的边缘细胞活性要大于离体边缘细胞.细胞黏液层厚度与Al3+浓度相关,且离体边缘细胞黏液层厚度要大于原位边缘细胞,耐铝品种中表现的更为明显.由此说明,荞麦边缘细胞在一定程度上能通过改变细胞活性和黏液层厚度对铝毒害做出适应性的反应.%The effect of Al toxicity on the reletive root length, the viability of the attached and detached root border cells and the production of mucilage of two buckwheat cultivars(Jiangxi and Neimeng) was studied using aeroponic culture method.Al stress could suppress root growth and the viability of root border cells of buckwheat.The viability of the root border cells clinging to the root tip was higher than that detached at same Al concentration.The thickness of mucilage layer was related to the Al concentration.and the layer of the attached root boeder cells was thicker than that of detached, especially in Altolerant cultivar (Jiangxi).These results indicated that border cells could make adaptive reaction to Al toxicitv by changingcell viability and producing of mucilage.