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Relationship Between Lignin Metabolism and Lodging Resistance of Culm in Buckwheat

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  • Can Wang
  • Renwu Ruan
  • Xiaohui Yuan
  • Dan Hu
  • Hao Yang
  • Yan Li
  • Zelin Yi

Abstract

To disclose the relationship between lignin content and lodging resistance, field experiments were conducted in 2012 and 2013 to investigate the dynamic changes of lignin content, the activities of four enzymes involved in lignin metabolism in culm, as well as the snapping resistance and lodging index of buckwheat. The lignin content and activities of phenylalanine ammonia-lyase (PAL), tyrosine ammonia-lyase (TAL), cinnamyl alcohol dehydrogenase (CAD), and 4-coumarate- CoA ligase (4CL) were tested with the 2nd internode of four cultivars with different lodging resistance. The snapping resistance and culm lodging index were determined at anthesis, grain filling, and maturity stages. The lignin content varied significantly among cultivars. The XD cultivar, which showed high resistance to culm snapping and lodging, had higher lignin content and higher activity of PAL, TAL, 4CL, and CAD than other cultivars. The lignin content was significantly negatively correlated with the actual lodging percent (r = -0.844, P < 0.01) and the lodging index (r = -0.832, P < 0.05), and was significantly positively correlated with the snapping resistance (r = 0.873, P < 0.01). The activities of PAL, TAL, 4CL, and CAD were positively correlated with lignin content with correlation coefficients of 0.984 (P<0.01), 0.619 (P > 0.05), 0.927 (P < 0.01), and 0.862 (P < 0.01), respectively. In conclusion, our results indicate that the activities of PAL and 4CL were the key enzymes that influenced the lignin content, and that the lignin content can be used as main indicators to evaluate the lodging resistance of buckwheat.

Suggested Citation

  • Can Wang & Renwu Ruan & Xiaohui Yuan & Dan Hu & Hao Yang & Yan Li & Zelin Yi, 2014. "Relationship Between Lignin Metabolism and Lodging Resistance of Culm in Buckwheat," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 6(9), pages 1-29, August.
    • Handle: RePEc:ibn:jasjnl:v:6:y:2014:i:9:p:29
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    References listed on IDEAS

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    1. Karolina CHRISTA & Maria SORAL-ŚMIETANA, 2008. "Buckwheat grains and buckwheat products - nutritional and prophylactic value of their components - a review," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 26(3), pages 153-162.
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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