Water stress and calcium concentration during the seed‐filling stage of soybean affect senescence

IF 1.7 4区农林科学 Q2 AGRONOMY

Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1998-06-01 DOI:10.1080/09064719809362483

A. Sorooshzadeh, N. Barthakur

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引用次数: 0

Abstract

Solutions of ruthenium red (RR, 0.01 mM), ethylene glycol‐bis‐(s‐aminoethyl ether)‐N,N,N’,N'‐tetraacetic acid (EGTA, 0.1 mM), calcium (Ca, 1 mM), and double‐distilled water (control) were fed through a bottom branch of soybean with (ST) and without (NS) water stress at the seed‐filling stage. The volume absorptions and transpiration rates were significantly higher for NS than for ST plants and decreased almost linearly with time for all treatments. The transpiration rates of Ca‐feeding ST plants and the control overlapped, while the NS plants approached the same rate of transpiration by the third week only. It is suggested that Ca was implicated in stomatal closure for the reduction of transpiration rates. The relative amounts of chlorophyll decreased with time but chlorophyll was least affected in Ca‐absorbing plants for both ST and NS plants. The use of RR (a Ca‐transport blocker) and EGTA (a Ca chelator) indicated the role of intracellular Ca concentrations on stomatal closure and foliar senescence at ...

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灌种期水分胁迫和钙浓度对大豆衰老有影响

在灌种阶段，分别在(ST)和(NS)胁迫下通过大豆底部分支饲喂钌红(RR, 0.01 mM)、乙二醇-双- (s -氨基乙醚)- N,N,N '，N' -四乙酸(EGTA, 0.1 mM)、钙(Ca, 1 mM)和双蒸馏水(对照)溶液。所有处理的体积吸收和蒸腾速率均随时间呈线性下降，而nsn处理的体积吸收和蒸腾速率均显著高于ST处理。补钙植株的蒸腾速率与对照重叠，而补钙植株的蒸腾速率仅在第3周才接近相同。结果表明，钙参与了气孔的关闭，降低了蒸腾速率。叶绿素的相对含量随着时间的推移而下降，但在吸收Ca的植物中，ST和NS植物的叶绿素受影响最小。利用钙转运阻滞剂RR和钙螯合剂EGTA，研究了细胞内钙浓度对叶面衰老和气孔关闭的影响。

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来源期刊

Acta Agriculturae Scandinavica Section B-Soil and Plant Science 农林科学-农艺学

CiteScore

4.40

自引率

0.00%

发文量

审稿时长

2.3 months

期刊介绍： Acta Agriculturæ Scandinavica Section B publishes original research in applied soil and plant science with special attention given to to crop production in agri- and horticultural systems. We welcome manuscripts dealing with: Climate smart and sustainable crop production systems Water and nutrient efficiency Soil conservation and productivity Precise agriculture systems Applications of bio- and nanotechnology Digitalisation and robotics Soil-plant interactions Acta Agriculturæ Scandinavica, Section B – Soil & Plant Science forms part of a series of titles published on behalf of the Nordic Association of Agricultural Science (NJF). The series also includes Section A - Animal Science .