【摘 要】
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Increasing the planting densities has been used as an effective approach for increasing crop yield per unit land area.However,plants compete with neighboring vegetation for light when planting at high
【机 构】
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Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing,100081
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Increasing the planting densities has been used as an effective approach for increasing crop yield per unit land area.However,plants compete with neighboring vegetation for light when planting at high densities.The shade of nearby vegetation reduces the ratio of red to far-red light,triggering a series of responses known collectively as shade avoidance syndrome (SAS):including accelerated elongation of stems,elevated leaf angles to the horizontal,reduced branching and early flowering.
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