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Transcriptome analysis of shade-induced inhibition on leaf size in relay intercropped soybean.


ABSTRACT: Multi-species intercropping is a sustainable agricultural practice worldwide used to utilize resources more efficiently. In intercropping systems, short crops often grow under vegetative shade of tall crops. Soybean, one important legume, is often planted in intercropping. However, little is known about the mechanisms of shade inhibition effect on leaf size in soybean leaves at the transcriptome level. We analyzed the transcriptome of shaded soybean leaves via RNA-Seq technology. We found that transcription 1085 genes in mature leaves and 1847 genes in young leaves were significantly affected by shade. Gene ontology analyses showed that expression of genes enriched in polysaccharide metabolism was down-regulated, but genes enriched in auxin stimulus were up-regulated in mature leaves; and genes enriched in cell cycling, DNA-replication were down-regulated in young leaves. These results suggest that the inhibition of higher auxin content and shortage of sugar supply on cell division and cell expansion contribute to smaller and thinner leaf morphology, which highlights potential research targets such as auxin and sugar regulation on leaves for crop adaptation to shade in intercropping.

SUBMITTER: Gong W 

PROVIDER: S-EPMC4041726 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Transcriptome analysis of shade-induced inhibition on leaf size in relay intercropped soybean.

Gong Wanzhuo W   Qi Pengfei P   Du Junbo J   Sun Xin X   Wu Xiaoling X   Song Chun C   Liu Weiguo W   Wu Yushan Y   Yu Xiaobo X   Yong Taiwen T   Wang Xiaochun X   Yang Feng F   Yan Yanhong Y   Yang Wenyu W  

PloS one 20140602 6


Multi-species intercropping is a sustainable agricultural practice worldwide used to utilize resources more efficiently. In intercropping systems, short crops often grow under vegetative shade of tall crops. Soybean, one important legume, is often planted in intercropping. However, little is known about the mechanisms of shade inhibition effect on leaf size in soybean leaves at the transcriptome level. We analyzed the transcriptome of shaded soybean leaves via RNA-Seq technology. We found that t  ...[more]

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