Nylon Filter Arrays Reveal Differential Expression of Expressed Sequence Tags in Wheat Roots Under Aluminum Stress
Nylon Filter Arrays Reveal Differential Expression of Expressed Sequence Tags in Wheat Roots Under Aluminum Stress作者机构：CollegeofAgronomyHebeiAgriculturalUniversityBaoding071001China／／USDA／ARSandDepartmentofAgronomyKansasStateUniversityManhattanKS66506USA USDA／ARSandDepartmentofAgronomyKansasStateUniversityManhattanKS66506USA DepartmentofPlantandSoilScienceOklahomaStateUniversityStillwaterOK74078USA
出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)
年 卷 期：2005年第47卷第7期
页 面：839-848页
核心收录：
主 题：aluminum tolerance differential gene expression near-isogenic lines suppression subtractive hybridization (SSH) wheat
摘 要：: To enrich differentially expressed sequence tags (ESTs) for aluminum (Al) tolerance, cDNA subtraction libraries were generated from Al-stressed roots of two wheat (Triticum aestivum L.) near-isogenic lines (NILs) contrasting in Al-tolerance gene(s) from the Al-tolerant cultivar Atlas 66, using suppression subtractive hybridization (SSH). Expression patterns of the ESTs were investigated with nylon filter arrays containing 614 cDNA clones from the subtraction library. Gene expression profiles from macroarray analysis indicated that 25 ESTs were upregulated in the tolerant NIL in response to Al stress. The result from Northern analysis of selected upregulated ESTs was similar to that from macroarray analysis. These highly expressed ESTs showed high homology with genes involved in signal transduction, oxidative stress alleviation, membrane structure, Mg2+ transportation, and other functions. Under Al stress, the Al-tolerant NIL may possess altered structure or function of the cell wall, plasma membrane, and mitochondrion. The wheat response to Al stress may involve complicated defense-related signaling and metabolic pathways. The present experiment did not detect any induced or activated genes involved in the synthesis of malate and other organic acids in wheat under Al-stress.
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