Isoflavonoid Accumulation Pattern as Affected by Shading from Maize in Soybean (<i>Glycine max</i> (L.) Merr.) in Relay Strip Intercropping System

Wei, Yan; Yan, Yanhong; Xiang, Dabing; Ye, Maoying; Yang, Wenyu; Liu, Jiang

doi:10.1626/pps.18.302

Cited by 4 publications

(1 citation statement)

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“…Nonetheless, in the maize-soybean strip intercropping system there were still some drawbacks, likewise, shorter crops (soybean) were shaded by the taller crops (maize) in the middle and later stage of soybean growth [11]. Maize shading caused the shade avoidance response for soybean, including slender stems and lower content of lignin in the stem, which in turn results in lodging to soybean [12][13][14][15]. Lodging was one of the important factors for the reduction of soybean yield and quality; studies have found that lodging causes soybean yield reduction up to 20-30% and up to 50% in severe cases [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Multiple Planting Densities on Lignin Metabolism and Lodging Resistance of the Strip Intercropped Soybean Stem

et al. 2020

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The shading of maize and self-shading are the key factors affecting the stem lignin biosynthesis and lodging resistance of soybean at middle and later growth stages in the strip intercropping system. A study was designed to explore the regulation mechanism of lignin metabolism and different planting densities; PD1, PD2, and PD3 were used having a total number of 17 plants m−2, 20 plants m−2, and 25 plants m−2, respectively, on the lodging resistance of strip intercropped soybean stem. Our results depicted that the lower planting density (PD1) appropriately promoted the leaf photosynthesis activities (Pn), increase the activity of lignin-related enzymes and the accumulation of carbohydrates in stems, and eventually enhanced the lodging resistance of the strip intercropped soybean stem. Correlation analysis also showed that the lodging resistance index of soybean stem was significantly correlated with the available light for soybean canopy and Pn strip intercropped soybean stem characteristics and activities of enzymes related to lignin synthesis among the different planting densities. The findings of our research will be useful in future studies to understand the relationship between different light environment, planting densities, and lodging resistance of intercropped soybean and also guide the optimum planting density in maize–soybean intercropping system.

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