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Comparative ecophysiological study of salt stress for wild and cultivated soybean species from the Yellow River Delta, China.

Wu G, Zhou Z, Chen P, Tang X, Shao H, Wang H - ScientificWorldJournal (2014)

Bottom Line: For this reason, we compared the different performances of Glycine max L. (ZH13) and Glycine soja L. (BB52) in both young and mature seedlings, hoping to clarify the specific reasons.Our research revealed that, compared to the cultivated soybean, the wild soybean was able to maintain higher water potential and relative water content (RWC), accumulate more amount of proline and glycine betaine, reduce the contents of Na(+) and Cl(-) by faster efflux, and cut down the efflux of the K(+) as well as keep higher K(+)/Na(+) ratio.Therefore, according to all the detections and comparisons, we concluded that the wild soybean had different tolerance mechanisms and better salt resistance.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

ABSTRACT
Osmotic and ionic stresses were the primary and instant damage produced by salt stress. They can also bring about other secondary stresses. Soybean is an important economic crop and the wild soybean aroused increasing attention for its excellent performance in salt resistance. For this reason, we compared the different performances of Glycine max L. (ZH13) and Glycine soja L. (BB52) in both young and mature seedlings, hoping to clarify the specific reasons. Our research revealed that, compared to the cultivated soybean, the wild soybean was able to maintain higher water potential and relative water content (RWC), accumulate more amount of proline and glycine betaine, reduce the contents of Na(+) and Cl(-) by faster efflux, and cut down the efflux of the K(+) as well as keep higher K(+)/Na(+) ratio. And what is more is that, almost all the excel behaviors became particularly obvious under higher NaCl concentration (300 mM). Therefore, according to all the detections and comparisons, we concluded that the wild soybean had different tolerance mechanisms and better salt resistance. It should be used as eminent germplasm resource to enhance the resistant ability of cultivated soybean or even other crops.

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Related in: MedlinePlus

(a) Changes of ion content in young seeding under salt stress. (b) Changes of ion content in mature seeding under salt stress.
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fig3: (a) Changes of ion content in young seeding under salt stress. (b) Changes of ion content in mature seeding under salt stress.

Mentions: The difference in ion concentration is another important feature under salt stress; thus, we also detected the contents of the Na+, K+, and Cl− under different NaCl treatments. Firstly the situation changes of young seedlings were examined. From Figure 3(a), we can find that the contents of both Na+ and Cl− of leaves and roots increased significantly with the increase of NaCl concentration, manifesting a similar trend. With 300 mM NaCl treatment, the content of Na+ in leaves and roots of ZH13 increased 10.2 and 2.8, respectively; the situation of Cl− was 8.5 and 2.1. However, the values for BB52 were 5.5, 2.1, 2.9, and 1.5, correspondingly. Between two soybean strains, the variation of ion contents in roots was tiny, but the difference was great in leaves (Figure 3(a)). For K+, the situation was exactly adverse. The consequence shows that the NaCl inhibited the absorption of K+ significantly; thus, the K+ content decreased in leaves and roots, especially in roots. K+ has a key role in the growth and development of plants; hence, the K+/Na+ ratio is a marker of the resistance. Generally, compared to ZH13, the degree of change of all the ion contents in BB52 was more at ease, the content of K+ in specific. In other words, under salt stress, the BB52 maintained a significantly higher K+/Na+ ratio than ZH13, just as the result suggests. Therefore, we can conclude that the BB52 was endowed with stronger resistance. Almost the same trends were discovered in mature seedlings (Figure 3(b)). The only difference was that the distinguished extent of the K+/Na+ ratio lessened. In addition, the content of the Na+ and Cl− contents were abound in senile leaves.


Comparative ecophysiological study of salt stress for wild and cultivated soybean species from the Yellow River Delta, China.

Wu G, Zhou Z, Chen P, Tang X, Shao H, Wang H - ScientificWorldJournal (2014)

(a) Changes of ion content in young seeding under salt stress. (b) Changes of ion content in mature seeding under salt stress.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4066866&req=5

fig3: (a) Changes of ion content in young seeding under salt stress. (b) Changes of ion content in mature seeding under salt stress.
Mentions: The difference in ion concentration is another important feature under salt stress; thus, we also detected the contents of the Na+, K+, and Cl− under different NaCl treatments. Firstly the situation changes of young seedlings were examined. From Figure 3(a), we can find that the contents of both Na+ and Cl− of leaves and roots increased significantly with the increase of NaCl concentration, manifesting a similar trend. With 300 mM NaCl treatment, the content of Na+ in leaves and roots of ZH13 increased 10.2 and 2.8, respectively; the situation of Cl− was 8.5 and 2.1. However, the values for BB52 were 5.5, 2.1, 2.9, and 1.5, correspondingly. Between two soybean strains, the variation of ion contents in roots was tiny, but the difference was great in leaves (Figure 3(a)). For K+, the situation was exactly adverse. The consequence shows that the NaCl inhibited the absorption of K+ significantly; thus, the K+ content decreased in leaves and roots, especially in roots. K+ has a key role in the growth and development of plants; hence, the K+/Na+ ratio is a marker of the resistance. Generally, compared to ZH13, the degree of change of all the ion contents in BB52 was more at ease, the content of K+ in specific. In other words, under salt stress, the BB52 maintained a significantly higher K+/Na+ ratio than ZH13, just as the result suggests. Therefore, we can conclude that the BB52 was endowed with stronger resistance. Almost the same trends were discovered in mature seedlings (Figure 3(b)). The only difference was that the distinguished extent of the K+/Na+ ratio lessened. In addition, the content of the Na+ and Cl− contents were abound in senile leaves.

Bottom Line: For this reason, we compared the different performances of Glycine max L. (ZH13) and Glycine soja L. (BB52) in both young and mature seedlings, hoping to clarify the specific reasons.Our research revealed that, compared to the cultivated soybean, the wild soybean was able to maintain higher water potential and relative water content (RWC), accumulate more amount of proline and glycine betaine, reduce the contents of Na(+) and Cl(-) by faster efflux, and cut down the efflux of the K(+) as well as keep higher K(+)/Na(+) ratio.Therefore, according to all the detections and comparisons, we concluded that the wild soybean had different tolerance mechanisms and better salt resistance.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

ABSTRACT
Osmotic and ionic stresses were the primary and instant damage produced by salt stress. They can also bring about other secondary stresses. Soybean is an important economic crop and the wild soybean aroused increasing attention for its excellent performance in salt resistance. For this reason, we compared the different performances of Glycine max L. (ZH13) and Glycine soja L. (BB52) in both young and mature seedlings, hoping to clarify the specific reasons. Our research revealed that, compared to the cultivated soybean, the wild soybean was able to maintain higher water potential and relative water content (RWC), accumulate more amount of proline and glycine betaine, reduce the contents of Na(+) and Cl(-) by faster efflux, and cut down the efflux of the K(+) as well as keep higher K(+)/Na(+) ratio. And what is more is that, almost all the excel behaviors became particularly obvious under higher NaCl concentration (300 mM). Therefore, according to all the detections and comparisons, we concluded that the wild soybean had different tolerance mechanisms and better salt resistance. It should be used as eminent germplasm resource to enhance the resistant ability of cultivated soybean or even other crops.

Show MeSH
Related in: MedlinePlus