Effect of Osmotic and Ionic Stresses on Proline and Organic Acid Contents during Imbibition and Germination of Soybean Seeds

Krackhardt, Michael; Guerrier, Gilles

doi:10.1016/s0176-1617(11)81939-5

Cited by 8 publications

(2 citation statements)

References 21 publications

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“…The role of proline as osmoprotectant in soybean remains controversial due to several contradictory findings. There was no change in the proline content of the soybean cultivar “Maple arrow” even the growth rate was reduced by 55% under salt stress (Krackhard and Guerrier 1995). The salt‐sensitive cultivar “Bragg” accumulated more proline than the salt‐tolerant cultivar “Ranson” when placed under salt treatment, implying a negative correlation between proline content and salt tolerance (Moftah and Michel 1987).…”

Section: Mechanisms Of Salt Tolerance In Soybeanmentioning

confidence: 99%

Salt Tolerance in Soybean

Phang

Shao

Lam

2008

JIPB

247

169

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Soybean is an important cash crop and its productivity is significantly hampered by salt stress. High salt imposes negative impacts on growth, nodulation, agronomy traits, seed quality and quantity, and thus reduces the yield of soybean. To cope with salt stress, soybean has developed several tolerance mechanisms, including: (i) maintenance of ion homeostasis; (ii) adjustment in response to osmotic stress; (iii) restoration of osmotic balance; and (iv) other metabolic and structural adaptations. The regulatory network for abiotic stress responses in higher plants has been studied extensively in model plants such as Arabidopsis thaliana. Some homologous components involved in salt stress responses have been identified in soybean. In this review, we tried to integrate the relevant works on soybean and proposes a working model to describe its salt stress responses at the molecular level.Key words: abiotic stress; Glycine max; ion homeostasis; osmotic adjustment; reactive oxygen species scavenging; salt tolerance; soybean. HM (2008). Salt tolerance in soybean. J. Integr. Plant Biol. 50(10), 1196-1212. Available online at www.jipb.net Due to its high protein and oil content, soybean is an important cash crop for human diet, animal feeds, and biodiesel. It is also used as raw material for many human health and industrial products. Therefore, the demand for soybean is ever increasing worldwide. Phang TH, Shao G, LamSalt stress is one of the abiotic stresses that significantly reduce the yield of soybean. Soybean germplasms display a spectrum of salt tolerance capability. A vast collection of soybean genotypes was screened in order to identify genetic materials showing high tolerance to salt stress (Shao et al. 1986). Currently, breeding is the major strategy to improve the salt tolerance of soybean. However, the efficiency of traditional breeding is low because of the long breeding cycle, incompatible fertilization, and close linkage between abiotic stress tolerance loci and undesirable characters (e.g. low yield) (Wang et al. 2003). Received 18 Mar. 2008 Accepted 18 Jun. 2008 Supported by the Hong Kong RGC Earmarked Grant CUHK4434/04M and the Hong Kong UGC AoE Plant and Agricultural Biotechnology Project AoE-B-07/09 (to H.M. Lam).* Author for correspondence. Molecular breeders suggest a concept of "breeding by design" as a targeted, efficient, and comprehensive strategy to elevate the salt tolerance of soybean (Peleman and Dvan der Voort 2003;Wan 2006). A better understanding of salt stress response and the underlying tolerance mechanism is important for implementation of such a tactic.This review aims to summarize the current understanding on the salt stress responses and tolerance mechanisms in soybean. Effects of Salt Stress on Growth, Agronomy Traits and Seed Quality of SoybeanSoybean is classified as a moderately salt-tolerant crop and the final yield of soybean will be reduced when soil salinity exceeds 5 dS/m (Ashraf 1994). It was shown that the average production of 20 soybean cultivars under nonsal...

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Section: Mechanisms Of Salt Tolerance In Soybeanmentioning

confidence: 99%

Salt Tolerance in Soybean

Phang

Shao

Lam

2008

JIPB

247

169

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“…Proline is accumulated in plants as a consequence of various types of environmental stress, such as altitude, drought, salinity or temperature [19][20][21]. However, no information about proline is available with respect to growth induced by the presence of SCSFA.…”

Section: Resultsmentioning

confidence: 99%

Modifications to polyamines provoked by short-chain saturated fatty acids in Cicer arietinum seeds

et al. 1997

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Abstract--Short-chain saturated fatty acids (SCSFA), ranging from pentanoic (C5) to decanoic acid (C~0), when added at micromolar concentrations to the germination medium of chick-pea seeds, did not significantly affect radicle emergence, although fresh weight diminished. Only heptanoic acid (C7) and octanoic acid (Cs) stimulated ethylene production and free spermidine and spermine content, whereas putrescine reached a maximum with nonanoic acid (C9). All the SCSFA tested increased the polyamines (PAs) bound to substances of low Mr; however, only hexanoic acid (C6) and C9 acid induced a strong appearance of PAs bound to substances of high Mr. Proline synthesis was stimulated in the presence of C7 acid and C9 acid, but values lower than control were obtained with the other SCSFA studied. (C 1997 Elsevier Science Ltd. All rights reserved INTRODUCTION

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Low Temperature Stress in Plants: An Overview of Roles of Cryoprotectants in Defense

Bhandari

Nayyar

2013

Physiological Mechanisms and Adaptation Strategies in Plants Under Changing Environment

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Effect of Osmotic and Ionic Stresses on Proline and Organic Acid Contents during Imbibition and Germination of Soybean Seeds

Cited by 8 publications

References 21 publications

Salt Tolerance in Soybean

Salt Tolerance in Soybean

Modifications to polyamines provoked by short-chain saturated fatty acids in Cicer arietinum seeds

Low Temperature Stress in Plants: An Overview of Roles of Cryoprotectants in Defense

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