Morphological responses and adaptation of Haloxylon ammodendron seedlings to light

doi:10.14088/j.cnki.issn0439-8114.2021.13.018

Abstract

Abstract: To interpret and predict the responses to shading, Haloxylon ammodendron seedlings were grown at four transmittance levels of 100%,75%, 35% and 5% of full natural light in field environment with artificially controlled light regimes for one growing season. Morphology and survival rates of these seedlings were measured to investigate their shade acclimation mechanisms. The results showed that, the branching angle of H. ammodendron seedlings at 100% transmittance level is higher and 1.60, 1.77 and 1.89 times than that at the other transmittance levels. The branches of H. ammodendron seedlings have an adaptation to different light conditions. The root, stem branch biomass and total biomass of H. ammodendron seedlings are significantly reduced with the decreasing of the light intensity and the difference is significant（P<0.05）. But the pattern of the biomass allocation parameters is not obvious. With the decreasing of the light intensity, the index of morphological plasticity has a trend of reduce, but the variation is smaller. We concluded that H. ammodendron seedlings plastically adapt to different light conditions through changes in morphological characteristics to maximize carbon gain.

Key words: Haloxylon ammodendron, morphological plasticity, light response

CLC Number:

HU Xiao-jing, ZHANG Xue-qin. Morphological responses and adaptation of Haloxylon ammodendron seedlings to light[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(13): 93-96.

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