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Comparative analysis of endogenous hormones level in two soybean (Glycine max L.) lines differing in waterlogging tolerance.

Kim YH, Hwang SJ, Waqas M, Khan AL, Lee JH, Lee JD, Nguyen HT, Lee IJ - Front Plant Sci (2015)

Bottom Line: Endogenous hormones also showed significant differences between WTL and WSL.The ratio of total GA and ABA was significantly higher in WTL than in WSL.Anatomical study of the root revealed that aerenchyma cells in the stele were better developed in WTL than in WSL.

View Article: PubMed Central - PubMed

Affiliation: Division of Plant Biosciences, Kyungpook National University Daegu, South Korea ; Division of Plant Sciences and National Center for Soybean Biotechnology, University of Missouri Columbia, MO, USA.

ABSTRACT
Waterlogged condition due to flooding is one of the major abiotic stresses that drastically affect the soybean growth and yield around the world. As a result, many breeders have focused on the development of waterlogging tolerance in soybean varieties, and thus, several tolerant varieties were developed. However, the physiological mechanism of waterlogging tolerance is not yet fully understood. We particularly studied the endogenous hormones regulation during waterlogging in two contrasting soybean genotypes. According to our results, adventitious roots were better developed in the waterlogging tolerant line (WTL) than in the waterlogging susceptible line (WSL). Endogenous hormones also showed significant differences between WTL and WSL. The ethylene production ratio was higher in WTL than in WSL, and methionine was higher in WTL than in WSL. Other endogenous abscisic acid (ABA) contents were lower in WTL than in WSL. Conversely, gibberellic acid (GA) showed a tendency to be high in WTL, especially the levels of the bioactive GA4. The ratio of total GA and ABA was significantly higher in WTL than in WSL. Anatomical study of the root revealed that aerenchyma cells in the stele were better developed in WTL than in WSL.

No MeSH data available.


Endogenous jasmonic acid (JA) (A) and salicylic acid (SA) (B) contents in two soybean lines after waterlogging treatment. In the figures, WTL indicates the waterlogging tolerant line (PI408105A) and WSL denotes the waterlogging susceptible line (S99-2281). In the figure, star marks indicate a significant difference between control and treatment at P < 0.05 or P < 0.01. Data is the average ± standard error (n = 3).
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Figure 6: Endogenous jasmonic acid (JA) (A) and salicylic acid (SA) (B) contents in two soybean lines after waterlogging treatment. In the figures, WTL indicates the waterlogging tolerant line (PI408105A) and WSL denotes the waterlogging susceptible line (S99-2281). In the figure, star marks indicate a significant difference between control and treatment at P < 0.05 or P < 0.01. Data is the average ± standard error (n = 3).

Mentions: Endogenous JA and SA are stress response hormones, so both hormones are accumulated under abiotic and biotic stress conditions. Further, these hormones have been known to be highly linked with ethylene production, and thus, plants enhance their stress resistance through interactions among hormones (ethylene, JA, and SA). Endogenous JA and SA contents after stress conditions are shown in Figure 6. JA content at 5 and 10 DAT was not significantly different between the control and treatment in both soybean lines (Figure 6A). On the other hand, SA level in WTL showed a significant difference from the control. Under waterlogging stress conditions, SA contents at 5 and 10 DAT in WTL were significantly higher than that under non-waterlogging condition, whereas the SA levels were not different between waterlogged and non-stress conditions in WSL (Figure 6B).


Comparative analysis of endogenous hormones level in two soybean (Glycine max L.) lines differing in waterlogging tolerance.

Kim YH, Hwang SJ, Waqas M, Khan AL, Lee JH, Lee JD, Nguyen HT, Lee IJ - Front Plant Sci (2015)

Endogenous jasmonic acid (JA) (A) and salicylic acid (SA) (B) contents in two soybean lines after waterlogging treatment. In the figures, WTL indicates the waterlogging tolerant line (PI408105A) and WSL denotes the waterlogging susceptible line (S99-2281). In the figure, star marks indicate a significant difference between control and treatment at P < 0.05 or P < 0.01. Data is the average ± standard error (n = 3).
© Copyright Policy
Related In: Results  -  Collection

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Figure 6: Endogenous jasmonic acid (JA) (A) and salicylic acid (SA) (B) contents in two soybean lines after waterlogging treatment. In the figures, WTL indicates the waterlogging tolerant line (PI408105A) and WSL denotes the waterlogging susceptible line (S99-2281). In the figure, star marks indicate a significant difference between control and treatment at P < 0.05 or P < 0.01. Data is the average ± standard error (n = 3).
Mentions: Endogenous JA and SA are stress response hormones, so both hormones are accumulated under abiotic and biotic stress conditions. Further, these hormones have been known to be highly linked with ethylene production, and thus, plants enhance their stress resistance through interactions among hormones (ethylene, JA, and SA). Endogenous JA and SA contents after stress conditions are shown in Figure 6. JA content at 5 and 10 DAT was not significantly different between the control and treatment in both soybean lines (Figure 6A). On the other hand, SA level in WTL showed a significant difference from the control. Under waterlogging stress conditions, SA contents at 5 and 10 DAT in WTL were significantly higher than that under non-waterlogging condition, whereas the SA levels were not different between waterlogged and non-stress conditions in WSL (Figure 6B).

Bottom Line: Endogenous hormones also showed significant differences between WTL and WSL.The ratio of total GA and ABA was significantly higher in WTL than in WSL.Anatomical study of the root revealed that aerenchyma cells in the stele were better developed in WTL than in WSL.

View Article: PubMed Central - PubMed

Affiliation: Division of Plant Biosciences, Kyungpook National University Daegu, South Korea ; Division of Plant Sciences and National Center for Soybean Biotechnology, University of Missouri Columbia, MO, USA.

ABSTRACT
Waterlogged condition due to flooding is one of the major abiotic stresses that drastically affect the soybean growth and yield around the world. As a result, many breeders have focused on the development of waterlogging tolerance in soybean varieties, and thus, several tolerant varieties were developed. However, the physiological mechanism of waterlogging tolerance is not yet fully understood. We particularly studied the endogenous hormones regulation during waterlogging in two contrasting soybean genotypes. According to our results, adventitious roots were better developed in the waterlogging tolerant line (WTL) than in the waterlogging susceptible line (WSL). Endogenous hormones also showed significant differences between WTL and WSL. The ethylene production ratio was higher in WTL than in WSL, and methionine was higher in WTL than in WSL. Other endogenous abscisic acid (ABA) contents were lower in WTL than in WSL. Conversely, gibberellic acid (GA) showed a tendency to be high in WTL, especially the levels of the bioactive GA4. The ratio of total GA and ABA was significantly higher in WTL than in WSL. Anatomical study of the root revealed that aerenchyma cells in the stele were better developed in WTL than in WSL.

No MeSH data available.