Polyamines protect mung bean [Vigna radiata (L.) Wilczek] plants against drought stress

Omid Sadeghipour

doi:10.1556/019.70.2019.09

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Biologia Futura

Volume/Issue:: Volume 70: Issue 1

Polyamines protect mung bean [Vigna radiata (L.) Wilczek] plants against drought stress

Author:

Omid Sadeghipour

Omid Sadeghipour Department of Agronomy, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran 18155/144, Iran

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Pages:: 71–78

Online Publication Date:: 16 Apr 2019

Publication Date:: 01 Mar 2019

Article Category:: Journal Article

DOI:: https://doi.org/10.1556/019.70.2019.09

Keywords:: putrescine; seed priming; spermidine; spermine; water stress

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Introduction

Drought is a major environmental factor that limits crops productivity. To cope with the adverse effects of drought, plants have evolved various adaptive mechanisms, such as accumulation of osmolytes. Polyamines (PAs) play an important role in the plant growth and development and response to abiotic stresses. This experiment was conducted to investigate the role of exogenous PAs on drought tolerance of mung bean.

Methods

Mung bean seeds were soaked in 0 or 100 µM putrescine (Put), spermidine (Spd), spermine (Spm), or their mixture for 10 hr. Then, treated seeds were sown in the field and were exposed to drought stress condition.

Results

The growth attributes including shoot length, biomass, leaf area index (LAI), and grain yield markedly reduced due to drought stress. Drought stress also decreased soluble protein content, relative water content (RWC), chlorophyll value, stomatal conductance (g_s), and net photosynthetic rate (P_N) but increased malondialdehyde (MDA), total soluble sugars (TSS), and proline contents. Nonetheless, seed priming with the mixture of PAs alleviated adverse effects of drought stress and improved all growth attributes. Exogenous application of PAs also increased soluble protein content, RWC, chlorophyll value, P_N, and more increased TSS and proline contents but decreased g_s and MDA level.

Discussion

These results indicated that seed treatment with PAs especially combined treatment of Put + Spd + Spm could enhance drought tolerance of mung bean plants through the accumulation of osmoprotectants, improving water status, chlorophyll value, and P_N as well as reduction of oxidative damage.

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Biologia Futura

Print ISSN:: 2676-8615

Online ISSN:: 2676-8607

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Biologia Futura
Language	English
Size	A4
Year of Foundation	2019 (1950)
Volumes per Year	1
Issues per Year	4
Founder	Magyar Tudományos Akadémia
Founder's Address	H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	2676-8615 (Print)
ISSN	2676-8607 (Online)