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3473

Changes in Yield and Chloroplast Mg2+-ATPase Activity of Wheat (Triticum aestivum L.) in Response to Soil Salinity and Nutrient Supply

Article

Last updated: 01 Jan 2025

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Subjects

-

Tags

Soil Fertility & plant nutrition

Abstract

Under stress conditions such as salinity and drought, plant tolerance depends on upregulating ATPase activity. A greenhouse and a field experiments were conducted to investigate the regulation of chloroplast Mg+2-ATPase activity in wheat in response to soil salinity and nutrient supply. 
In the greenhouse, plants were imposed irrigation with three water salinities; 0.4, 4.0, and 8.0 dSm-1 with different sub-treatments of nutrient applications. Wheat yield was negatively correlated with soil salinity, presenting threshold at 6 dSm-1 followed by yield reduction with slope 7.4 % per unit dSm-1. Salt stress decreased Mg+2-ATP activity from 0.32 to 0.28 µmole Pi min-1 mg-1chl. Application of mixed fertilizers M.F. (compost, Gypsum, P, and K) for the non stressed plants resulted in increasing both Mg2+-ATPase from 0.32 to 0.40 and the relative grain yield to 120%, suggesting anabolic metabolism. At soil salinity above the threshold level, application of nutrients sharply increased Mg2+-ATPase activity up to 1.06 µmole Pi min-1 mg-1chl accompanying yield reduction; suggesting catabolic metabolism.
          In the field experiment, the soil salinity was 12.3 dSm-1 at planting and only drainage water (EC 3.9 dSm-1) was available for irrigation. The soil EC steeply reduced to 5.0 dSm-1 before the productive growth stages. Mg+2-ATPase activity was up-regulated at flowering and was low late in the season at the grain filling stage. Foliar spray with K+ and a biostimulant enhanced ATPase activity as well as grain yield compared to the control. Under the field condition Mg2+-ATPase activity was correlated with the grain yield, which reached 8.7 Mg ha-1.
The variation in wheat response in the greenhouse to that in the field may be attributed to the greenhouse conditions that impaired photosynthesis activity and induced catabolic ATP hydrolysis.

DOI

10.21608/asejaiqjsae.2017.3473

Keywords

Wheat, Mg2+-ATPase, Soil salinity, Grain yield

Authors

First Name

Mahmoud

Last Name

Kamh

MiddleName

-

Affiliation

Soil & Water Science Dept. Faculty of Agriculture, Alexandria University, Egypt.

Email

mahmoud.kamh@alexu.edu.eg

City

-

Orcid

-

First Name

Attiat

Last Name

El-Hamrawy

MiddleName

-

Affiliation

Soil & Water Science Dept. Faculty of Agriculture, Alexandria University, Egypt.

Email

-

City

-

Orcid

-

Volume

38

Article Issue

April-June

Related Issue

348

Issue Date

2017-06-01

Receive Date

2017-05-28

Publish Date

2017-06-01

Page Start

284

Page End

293

Print ISSN

1110-0176

Online ISSN

2536-9784

Article File

ASEJAIQJSAE_Volume 38_Issue April-June_Pages 284-293.pdf

PDF . 297.5kB

Link

https://asejaiqjsae.journals.ekb.eg/article_3473.html

Detail API

https://asejaiqjsae.journals.ekb.eg/service?article_code=3473

Order

14

Type

Original Article

Type Code

53

Publication Type

Journal

Publication Title

Alexandria Science Exchange Journal

Publication Link

https://asejaiqjsae.journals.ekb.eg/

MainTitle

Changes in Yield and Chloroplast Mg2+-ATPase Activity of Wheat (Triticum aestivum L.) in Response to Soil Salinity and Nutrient Supply

Details

Type

Article

Created At

22 Jan 2023