NMT历史上的今天
2014年12月16日,山东省农科院孔令安用NMT在Frontiers in Plant Science上发表了标题为Effects of high NH4+ on K+ uptake, culm mechanical strength and grain filling in wheat的研究成果。
期刊:Frontiers in Plant Science
主题:高铵抑制小麦根部钾吸收
标题:Effects of high NH4+on K+ uptake, culm mechanical strength and grain filling in wheat
影响因子:4.495
检测指标:K+流速
作者:山东省农科院孔令安
英文摘要
It is well established that a high external NH4+
concentration depresses many processes in plant development, but the
underlying mechanisms are still not well understood. To determine
whether the negative effects of high levels of NH4+ are related to
competitive cation uptake, wheat was grown in a field with moderate (18 g
N m?2) and high (30 g N m?2) supplies ofNH4+ in the presence or
absence of additional K+ (6 g K2O m?2) to examine culm mechanical
strength, the main components of the vascular bundle, nitrogen (N)
remobilization and the grain-filling rate.
The results indicated that an excessive supply of NH4+ significantly
decreased culm mechanical strength, the cellulose and lignin contents
of vascular bundles, the N remobilization efficiency (NRE) and the
grain-filling rate compared with a moderate level of NH4+. The
additional provision of K+ considerably alleviated these negative
effects of high NH4+, resulting in a 19.41–26.95% increase in culm
mechanical strength during grain filling and a 34.59% increase in the
NRE. An assay using the scanning ion-selective electrode technique
(SIET) showed that the net rate of transmembrane K+ influx decreased by
84.62%, and measurements using flame photometry demonstrated that the
K+ content decreased by 36.13% in wheat plants subjected to high NH4+.
This study indicates that the effects of high NH4+ on culm mechanical
strength, cellulose and lignin contents, the NRE and the grain-filling
rate are probably associated with inhibition of K+ uptake in wheat.
中文摘要(谷歌机翻)
众所周知,外部NH4+
的高浓度会抑制植物发育中的许多过程,但其潜在机理仍未得到很好的理解。为了确定高水平的NH4+的负面影响是否与竞争性阳离子摄入相关,将小麦种植在提供适量(18
g N m-2)和大量(30 g N m-2)NH4+的田地上在存在或不存在额外的K+(6 g K2O
m-2)的情况下进行图4的测试,以检查茎秆机械强度,维管束的主要成分,氮(N)迁移和谷粒填充率。
结果表明,与中等水平的NH4+相比,过量供应NH4+会显着降低茎秆机械强度,维管束中纤维素和木质素的含量,氮的固定效率(NRE)和籽粒填充率。额外提供的K+大大减轻了高NH4+的这些负面影响,导致籽粒灌浆期间茎秆机械强度提高了19.41–26.95%,NRE增加了34.59%。使用扫描离子选择电极技术(SIET)进行的分析表明,跨膜K
+流入的净速率降低了84.62%,而使用火焰光度法的测量结果表明,在高NH4+的小麦植株中,K+含量降低了36.13%。。
这项研究表明,高NH4+对小麦茎秆机械强度,纤维素和木质素含量,NRE和籽粒充实率的影响可能与抑制小麦吸收K+有关。
(B) The effects of 10 mM NH4+ on the kinetics of the
net K+ ?uxes in wheat root epidermal cells; each point is the mean from
six individual plants. (C) Each column presents
the mean values of the K+ ?uxes measured in the root epidermal cells
over a recording period of 30 min. Nm: moderate NH4+,Nh:10mM NH4+
treatment. The bars represent the standard deviation for six individual
plants. The different letters indicated above each column refer to
signi?cant differences at the P < 0.05 level.
更多
DS3000应用|微卫星不稳定性(MSI)分析在一胰腺癌切除术临床案例术后长期肿瘤基因型追踪分析中的应用
厂商
2021.06.04
直播预告 | 聚焦宠物食品质量安全
厂商
2022.06.25
筑梦新空间,启航新征程!瑞士万通中国广州分公司乔迁新篇章!
厂商
2024.08.07
固废标准新篇章:GB 16889-2024《生活垃圾填埋场污染控制标准》标准修订
厂商
2024.09.03