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  Liu-Qing Wang, Lin-Tong Yang, Peng Guo, Xin-Xing Zhou, Xin Ye, En-Jun Chen. Leaf cDNA-AFLP analysis reveals novel mechanisms for boron-induced alleviation ofaluminum-toxicityin Citrus grandis seedlings  
 
 
 
   Date: 2015-06-25   Author:   View: 44
 
   
     
 

Leaf cDNA-AFLPanalysisrevealsnovelmechanismsforboron-induced.pdf

Abstract:

Little informationis available on the molecular mechanisms of boron(B)-induced alleviation ofa luminum (Al)-toxicity. ‘Sour pummelo’ (Citrus grandis) seedlings were irrigated for 18 weeks with nutrient solution containing different concentrations of B(2.5or20μM H3BO3) and Al (0 or1.2m MAlCl3  6H2O). B  alleviated Al-induced inhibition in plant growth accompanied by lower leaf Al.We used cDNA-AFLP to isolate  127 differentially expressed genes from leaves subjected to Band Al interactions. These genes  were related to signal transduction, transport, cell wall modification, carbohydrate and energy metabolism,  nucleic acid metabolism, amino acid and protein metabolism, lipid metabolism and stress responses. The ameliorative mechanisms of B on Al-toxicity might be related to: (a) triggering multiple signal transduction pathways; (b)improving the expression levels of genes related to transport;(c)activating genes involved in energy production;and (d)increasing amino acid accumulation and protein degradation.Also, genes involved in nucleic acid metabolism, cell wall modification and stress responses might play a role in B-induced alleviation of Al-toxicity. To conclude, our findings reveal some novel mechanisms on B-induced alleviation of Al-toxicity at the transcriptional level in C. grandis leaves.

 
 
     
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