What is the Difference between the Response of Grass Pea (Lathyrus sativus L.) to Salinity and Drought Stress?—A Physiological Study

Barbara Tokarz , Tomasz Wójtowicz , Wojciech Makowski , Roman Jędrzejczyk , Krzysztof Tokarz

Abstract

Understanding the mechanisms of plant tolerance to osmotic and chemical stress is fundamental to maintaining high crop productivity. Soil drought often occurs in combination with physiological drought, which causes chemical stress due to high concentrations of ions. Hence, it is often assumed that the acclimatization of plants to salinity and drought follows the same mechanisms. Grass pea (Lathyrus sativus L.) is a legume plant with extraordinary tolerance to severe drought and moderate salinity. The aim of the presented study was to compare acclimatization strategies of grass pea seedlings to osmotic (PEG) and chemical (NaCl) stress on a physiological level. Concentrations of NaCl and PEG were adjusted to create an osmotic potential of a medium at the level of 0.0, −0.45 and −0.65 MPa. The seedlings on the media with PEG were much smaller than those growing in the presence of NaCl, but had a significantly higher content percentage of dry weight. Moreover, the stressors triggered different accumulation patterns of phenolic compounds, soluble and insoluble sugars, proline and β-N-oxalyl-L-α,β-diamino propionic acid, as well as peroxidase and catalase activity. Our results showed that drought stress induced a resistance mechanism consisting of growth rate limitation in favor of osmotic adjustment, while salinity stress induced primarily the mechanisms of efficient compartmentation of harmful ions in the roots and shoots. Furthermore, our results indicated that grass pea plants differed in their response to drought and salinity from the very beginning of stress occurrence.
Author Barbara Tokarz (FoBaH / Department of Botany, Physiology and Plant Protection)
Barbara Tokarz,,
- Department of Botany, Physiology and Plant Protection
, Tomasz Wójtowicz (FoAaE / DoPoPBaSP)
Tomasz Wójtowicz,,
- Department of Physiology of Plant Breeding and Seed Production
, Wojciech Makowski (FoBaH / Department of Botany, Physiology and Plant Protection)
Wojciech Makowski,,
- Department of Botany, Physiology and Plant Protection
, Roman Jędrzejczyk - Jagiellonian University (UJ)
Roman Jędrzejczyk,,
-
, Krzysztof Tokarz (FoBaH / Department of Botany, Physiology and Plant Protection)
Krzysztof Tokarz,,
- Department of Botany, Physiology and Plant Protection
Journal seriesAgronomy, [Agronomy], ISSN 2073-4395, e-ISSN 2073-4395, (N/A 100 pkt)
Issue year2020
Vol10
No833
Pages1-24
Publication size in sheets1.15
Keywords in EnglishAbiotic stress; antioxidants; grass pea; NaCl; ODAP; osmotic potential; PEG
ASJC Classification1102 Agronomy and Crop Science
DOIDOI:10.3390/agronomy10060833
URL https://www.mdpi.com/2073-4395/10/6/833/pdf
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
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What is the Difference between the Response of Grass Pea (Lathyrus sativus L.) to Salinity and Drought Stress?—A Physiological Study of 15-06-2020
1,92 MB
Score (nominal)100
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.272; WoS Impact Factor: 2018 = 2.259 (2)
Citation count*
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FinansowanieThe research was supported by a subsidy (SUB/2019-0511000000-D507) of the Ministry of Science and Higher Education of the Republic of Poland aimed at maintenance and development of research potential of the Department of Botany, Physiology and Plant Protection
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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