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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.


Proline contents in the two soybean lines after waterlogging treatment. In the figures, WTL denotes the waterlogging tolerant line (PI408105A) and WSL indicates 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 4: Proline contents in the two soybean lines after waterlogging treatment. In the figures, WTL denotes the waterlogging tolerant line (PI408105A) and WSL indicates 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: The proline content after waterlogging stress is shown in Figure 4. At 5 DAT, proline contents were not significantly different, but at 10 DAT, proline contents showed a difference between WTL and WSL. The proline content was decreased in both lines after 10-day waterlogging treatment, and most significantly reduced in WTL, whereas proline was slightly decreased in WSL (Figure 4).


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)

Proline contents in the two soybean lines after waterlogging treatment. In the figures, WTL denotes the waterlogging tolerant line (PI408105A) and WSL indicates 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

License
Show All Figures
getmorefigures.php?uid=PMC4585003&req=5

Figure 4: Proline contents in the two soybean lines after waterlogging treatment. In the figures, WTL denotes the waterlogging tolerant line (PI408105A) and WSL indicates 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: The proline content after waterlogging stress is shown in Figure 4. At 5 DAT, proline contents were not significantly different, but at 10 DAT, proline contents showed a difference between WTL and WSL. The proline content was decreased in both lines after 10-day waterlogging treatment, and most significantly reduced in WTL, whereas proline was slightly decreased in WSL (Figure 4).

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.