Cd胁迫水培试验下水稻糙米Cd累积的关键生育时期

王倩倩,贾润语,李虹呈,周航,杨文弢,辜娇峰,彭佩钦,廖柏寒

Key Growth Stage of Cd Accumulation in Brown Rice Through a Hydroponic Experiment with Cd Stress

WANG QianQian,JIA RunYu,LI HongCheng,ZHOU Hang,YANG WenTao,GU JiaoFeng,PENG PeiQin,LIAO BoHan

表1 试验设计

Table 1 Experimental design

处理 Treatment 胁迫时间 Stress time (d) 试验处理 Experimental treatment 胁迫时期 Stress stage CK 0 不添加外源Cd,仅在自来水中添加营养液 Adding nutrient solution to tap water without exogenous Cd 无 No TS 15 水稻幼苗移栽后在营养液中添加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至分蘖期结束 Adding exogenous Cd to nutrient solution until to the end of tillering stage after transplanting, and keeping Cd concentration in nutrient solution at 20 μg·L-1 分蘖期 Tillering stage JS 15 水稻分蘖期结束开始加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至拔节期结束 Adding exogenous Cd to nutrient solution from the end of tillering stage to the end of jointing stage, and keeping Cd concentration in nutrient solution at 20 μg·L-1 拔节期 Jointing stage BS 21 水稻拔节期结束开始加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至孕穗期结束 Adding exogenous Cd to nutrient solution from the end of jointing stage to the end of booting stage, and keeping Cd concentration in nutrient solution at 20 μg·L-1 孕穗期 Booting stage FS 18 水稻孕穗期结束开始加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至灌浆期结束 Adding exogenous Cd to nutrient solution from the end of booting stage to the end of filling stage, and keeping Cd concentration in nutrient solution at 20 μg·L-1 灌浆期 Filling stage DS 15 水稻灌浆期结束开始加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至腊熟期结束 Adding exogenous Cd to nutrient solution from the end of filling stage to the end of dough stage, and keeping Cd concentration in nutrient solution at 20 μg·L-1 腊熟期 Dough stage MS 18 水稻腊熟期结束开始加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至成熟期结束 Adding exogenous Cd to nutrient solution from the end of dough stage to the end of maturing stage, and keeping Cd concentration in nutrient solution at 20 μg·L-1 成熟期 Maturing stage CG 102 水稻幼苗移栽后在营养液中添加外源Cd使营养液中的Cd浓度保持在20 μg·L-1,加Cd至成熟期结束 Adding exogenous Cd to nutrient solution until to the end of maturing stage after transplanting, and keeping Cd concentration in nutrient solution at 20 μg·L-1 全生育时期 Whole growth stages