蔗糖对低磷胁迫条件下大豆苗期根系形态和物质积累的影响  

Effect of Sucrose on Root Morphology and Substance Accumulation at Soybean Seedling Stage under Low Phosphorus Stress

作　　者：孔令剑[1] 朱倩[1] 单玉姿 谢甫绨[1] 王海英[1] 张惠君[1] 赵明哲[1] 敖雪[1] KONG Ling-jian, ZHU Qian, SHAN Yu-zi, XIE Fu-ti,WANG Hai-ying , ZHANG Hui-jun, ZHAO Ming-zhe, AO Xue(College of Agronomy, Shenyang Agricultural University, Shenyang 110866, Chin)

机构地区：[1]沈阳农业大学农学院,辽宁沈阳110866

出　　处：《大豆科学》2018年第2期239-245,共7页Soybean Science

基　　金：辽宁省高等学校优秀人才支持计划资助(LJQ2015097);辽宁省自然科学基金重点项目(201701526);国家重点研发计划(2017YFD0101306-04)

摘　　要：为了研究施加外源蔗糖对低磷胁迫下苗期大豆的影响,以两个不同磷效率大豆为试验材料,设置3个磷浓度水平(0,0.05和0.50 mmol·L^(-1))和2个蔗糖浓度水平(0%和1%)处理,测定幼苗时期不同处理下大豆根系形态、蔗糖含量、磷积累和植株生物量的积累特征。结果显示:加入蔗糖后,磷高效品种的根尖数由平均高于磷低效大豆的28.5%升高至88.9%,蔗糖含量、根系磷积累以及根系生物量平均升高15.5%、7.2%和26.6%;而磷低效品种蔗糖含量、根系磷积累以及根系生物量平均升高18.4%、31.7%和50.6%。表明蔗糖处理对磷低效品种在生物量积累以及养分吸收方面影响更显著。In order to study the effect of exogenous sucrose on the response mechanism of soybean seedling to low phosphorus stress, this study was conducted with two different phosphorus（P） efficient soybeans, three P concentrations （0, 0. 05 and 0. 50 mmol·L-1 ） and two sucrose levels （0% and 1% ） , to investigate the traits of root morphology, sucrose content, P ac- cumulation and plant biomass at soybean seedling stage. The results showed： For the low P efficient soybean, sucrose applica- tion enlarged the increment in root tip numbers of the high P efficient soybean than the low P efficient soybean, from 28. 5% to 88. 9%, compared with no sucrose application. Sucrose application increased the sucrose content, root phosphorus accumu- lation and the root biomass averagely by 15.5%, 7. 2% and 26. 6%, respectively. For the low P efficient soybean, the su- crose content, root phosphorus accumulation and the root biomass increased 18.4%, 31.7%, and 50. 6%, respectively. This result indicated that sucrose application affacted more significantly on biomass accumulation and nutrient absorption for the low P efficient soybeans.

关 键 词：大豆 低磷胁迫 根系 蔗糖 物质积累 

分 类 号：S565.1[农业科学—作物学]