Tolerance to Zn deficiency and P-Zn interaction in wheat seedlings cultured in chelator-buffered sol

来源 :干旱区科学 | 被引量 : 0次 | 上传用户:tom1313
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Zinc deficiency is a common constraint for wheat production in the regions with limited precipitation, particularly in the regions with high levels of available phosphate (P) in soil. Two experiments were conducted using chelator-buffered nutrient solutions to characterize differences in tolerance to Zn deficiency among three winter wheat (Triticum aestivum L.) genotypes and to investigate the relationship between P and Zn nutrition in wheat species. Four indices, Zn efficiency, relative shoot-to-root ratio, total Zn uptake in shoot, and shoot dry weight were used to compare the tolerance to Zn deficiency among three wheat genotypes. The results indicated that the four indices could be used in breeding selection for Zn uptake-efficient genotypes. The genotype H6712 was the most tolerant to Zn deficient, followed by M19, and then X13. Specifically, H6712 had the highest Zn uptake efficiency among the three genotypes. The addition of P to the growth medium increased Zn uptake and translocation from roots to shoots. Total Zn content of the wheat plant was 43% higher with 0.6 mmol/L P treatment than that of control with 0 mmol/L P treatment. The Zn translocation ratios from roots to shoots were increased by 16% and 26% with 0.6 mmol/L P treatment and 3 mmol/L P treatment, respectively, compared with 0 mmol/L P treatment. In contrast, high Zn concentrations in the growth medium inhibited P translocation from roots to shoots, but the inhibitive effects were not strong. Sixty-six percent of P taken up by wheat plants was translocated to the wheat shoots at 0 μmol/L Zn treatment, while the percent was 60% at 3 μmol/L Zn treatment. The result may be due to the fact that the wheat plants need more P than Zn.
其他文献
为了准确测量太阳总量辐射,研制了具备自动跟踪能力的太阳辐照绝对辐射计SIAR-3a.介绍了SIAR-3a的原理,提出了双轴太阳跟踪的控制方法.SIAR-3a采用电来标定待测量的太阳总量
本文应用事件研究法,对上证45支消费类个股在2009年"十一"黄金周前后的市场反应进行回归分析,并对结果进行显著性检验,结果发现在黄金周前后消费类股票股价有显著波动.
改革开放的不断深入,社会主义市场经济体制的不断完善,我国的民族区域自治面临着一些新情况和新问题,要想民族地区有新发展、新进步,区域自治制度就需要不断完善.
利用CFD对室内存在不同形式内隔断的地板送风办公房间进行了数值模拟,研究其速度场、温度场及污染物浓度场;分析了内隔断的存在对室内空气品质的影响.研究结果表明,在办公桌
唐律中的受贿犯罪可概括为受人财物而为请求、因公事受财和非因公事受财三种。与现行刑法相比,在调整范围上,唐律因将非因公事受财的行为犯罪化而更大;规范体系上二者各有优
本文仅就名优教师培养的重要性此新兴课题,结合其在职教工作中所具重要意义略作初步探讨性概述,强调重视并加大对此课题总体认识的力度利于职教事业长远发展,因此创建职教名
在城市建设工程中,GPS已经有广泛的应用,例如其可以用于各种类型的施工放样、测图、变形观测、和城市地理数据的采集等。GPS定位技术已基本上取代了常规测量手段,成为主要的技术
输电线路遍布范围的日益扩大,相关部门及主管人员必须对相应的检修工作予以足够的关注和重视,从实际情况出发,严格依照输电线路检修的规范及技术要求,做好相应的检修工作,以确保电
举例应用待定系数法,反证法,一元不等式f(x)=ax+b>0(f(x)=ax+b0/f(n)>0 ({a=0/b0/Δ
通过对战略采购的分析,对供应链整合进行了界定,并分析了其对供应链整合的影响。一方面阐明了采购的战略角色,另一方面分析得出战略采购对供应链整合有明显的促进作用,特别是