Effect of N Fertilizers on Root Growth and Endogenous Hormones in Strawberry

WANG Bo; LAI Tao; HUANG Qi-Wei; YANG Xing-Ming; SHEN Qi-Rong

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Effect of N Fertilizers on Root Growth and Endogenous Hormones in Strawberry

机译：氮肥对草莓根系生长和内源激素的影响

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Endogenous hormones play an important role in the growth and development of roots. The objective of this research was to study the effect of four types of N fertilizers on the root growth of strawberry (Fragaria ananassa Duchesne) and the endogenous enzymes of indole-3-acetic acid (IAA), abscisic acid (ABA), and isopentenyl adenosine (iPA) in its roots and leaves using enzyme-linked immunosorbent assay. Application of all types of N fertilizers significantly depressed (P ≤ 0.05) root growth at 20 d after transplanting. Application of organic-inorganic fertilizer (OIF) as basal fertilizer had a significant negative effect (P ≤ 0.05) on root growth. The application of OIF and urea lowered the lateral root frequency in strawberry plants at 60 d (P ≤ 0.05) compared with the application of two organic fertilizers (OFA and OFB) and the control (CK). With the fertilizer treatments, there were the same concentrations of IAA and ABA in both roots and leaves at the initial growth stage (20 d), lower levels of IAA and ABA at the later stage (60 d), and higher iPA levels at all seedling stages as compared to those of CK. Thus, changes in the concentrations of endogenous phytohormones in strawberry plants could be responsible for the morphological changes of roots due to fertilization.

机译：内源激素在根的生长发育中起重要作用。这项研究的目的是研究四种氮肥对草莓（Fragaria ananassa Duchesne）根系生长以及吲哚-3-乙酸（IAA），脱落酸（ABA）和异戊烯基的内源酶的影响。使用酶联免疫吸附法测定其根和叶中的腺苷（iPA）。移栽后20 d施用所有类型的氮肥均会显着抑制（P≤0.05）根系生长。有机无机肥料（OIF）作为基础肥料对根系生长有显着的负面影响（P≤0.05）。与施用两种有机肥料（OFA和OFB）和对照（CK）相比，在60 d时，OIF和尿素的施用降低了草莓植株的侧根发生频率（P≤0.05）。通过肥料处理，在初始生长阶段（20 d），根和叶中的IAA和ABA浓度相同，在后期（60 d）中的IAA和ABA含量较低，而所有iPA含量较高与CK相比，苗期。因此，草莓植株中内源性植物激素浓度的变化可能是受精导致根系形态变化的原因。

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《土壤圈（英文版）》 |2009年第1期|86-95|共10页
作者
WANG Bo; LAI Tao; HUANG Qi-Wei; YANG Xing-Ming; SHEN Qi-Rong;
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作者单位

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China;

Faculty of Horticulture, Soochow University, Suzhou 215006 China;

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China;

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China;

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China;

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
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Effect of N Fertilizers on Root Growth and Endogenous Hormones in Strawberry

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