华南农业大学学报2024，Vol.45Issue(3)：329-335,7.DOI:10.7671/j.issn.1001-411X.202304015
蔗糖对柱花草根尖类边缘细胞形成及耐铝功能的影响
Effects of sucrose on the formation of root border-like cells and aluminum tolerance in Stylosanthes guianensis
摘要
Abstract
[Objective]Root border cells(BCs)play important roles in plant resistance to biotic and abiotic stresses.However,the physiological mechanisms of BCs formation remains further exploration.This study was aimed to investigate the effects of sucrose on root border-like cells(BLCs)formation and aluminum(Al)tolerance function of stylo(Stylosanthes guianensis).[Method]Genotype'Reyan No.2'was used as plant material,exogenous carbohydrate sources were applied in the growth medium for treatments,and the morphology of stylo BLCs and the stylo Al tolerance were investigated.[Result]Both sucrose and glucose obviously promoted stylo BLCs formation.Compared with sugar-free,sucrose increased the fresh weight,length and width of stylo BLCs by 50%,14%and 62%respectively,and the number of cell layers was also higher as indicated by 3-4 layers more.The stylo retaining BLCs had strong aluminum resistance.Moreover,compared with sugar-free control,BLCs induced by sucrose showed stronger Al absorption ability,this subsequently enhanced the stylo Al resistance as indicated by the lower root tip Al accumulation and higher root relative growth rate,which increased by 45%.[Conclusion]Sucrose can promote BLCs formation in stylo,and subsequently enhance the stylo Al resistance.These results expand the knowledge on the development of BLCs and their function in stylo Al resistance.关键词
柱花草/根尖类边缘细胞/蔗糖/铝毒害Key words
Stylosanthes guianensis/Root border-like cell/Sucrose/Aluminum toxicity分类
农业科技引用本文复制引用
郭雪琼,林雁,蔡泽菲,陈倩倩,田江,陆星,梁翠月..蔗糖对柱花草根尖类边缘细胞形成及耐铝功能的影响[J].华南农业大学学报,2024,45(3):329-335,7.基金项目
国家自然科学基金(32172659) （32172659）
