Статья

Accumulation of genome‐specific transcripts, transcription factors and phytohormonal regulators during early stages of fiber cell development in allotetraploid cotton

S Samuel YangDepartment of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USAFoo CheungThe Institute for Genomic Research, Rockville, MD 20850, USA,Jinsuk J. LeeSection of Molecular Cell and Developmental Biology, The University of Texas, Austin, TX 78712, USA,Misook HaSection of Molecular Cell and Developmental Biology, The University of Texas, Austin, TX 78712, USA,Ning E. WeiDepartment of Computer Science, Texas A&M University, College Station, TX 77843, USA,Sing‐Hoi SzeDepartment of Computer Science, Texas A&M University, College Station, TX 77843, USA,David M. StellyDepartment of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA,P. M. ThaxtonDelta Research and Extension Center, Mississippi State University, Stoneville, MS 38776, USA, andBarbara A. TriplettUSDA-ARS Southern Regional Research Center, New Orleans, LA 70179, USAChristopher D. TownZ. Jeffrey ChenDepartment of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA,

2006en

ABI

Аннотация

Gene expression during the early stages of fiber cell development and in allopolyploid crops is poorly understood. Here we report computational and expression analyses of 32 789 high-quality ESTs derived from Gossypium hirsutum L. Texas Marker-1 (TM-1) immature ovules (GH_TMO). The ESTs were assembled into 8540 unique sequences including 4036 tentative consensus sequences (TCs) and 4504 singletons, representing approximately 15% of the unique sequences in the cotton EST collection. Compared with approximately 178 000 existing ESTs derived from elongating fibers and non-fiber tissues, GH_TMO ESTs showed a significant increase in the percentage of genes encoding putative transcription factors such as MYB and WRKY and genes encoding predicted proteins involved in auxin, brassinosteroid (BR), gibberellic acid (GA), abscisic acid (ABA) and ethylene signaling pathways. Cotton homologs related to MIXTA, MYB5, GL2 and eight genes in the auxin, BR, GA and ethylene pathways were induced during fiber cell initiation but repressed in the naked seed mutant (N1N1) that is impaired in fiber formation. The data agree with the known roles of MYB and WRKY transcription factors in Arabidopsis leaf trichome development and the well-documented phytohormonal effects on fiber cell development in immature cotton ovules cultured in vitro. Moreover, the phytohormonal pathway-related genes were induced prior to the activation of MYB-like genes, suggesting an important role of phytohormones in cell fate determination. Significantly, AA sub-genome ESTs of all functional classifications including cell-cycle control and transcription factor activity were selectively enriched in G. hirsutum L., an allotetraploid derived from polyploidization between AA and DD genome species, a result consistent with the production of long lint fibers in AA genome species. These results suggest general roles for genome-specific, phytohormonal and transcriptional gene regulation during the early stages of fiber cell development in cotton allopolyploids.

Перевод пока недоступен

Идентификаторы

DOI: 10.1111/j.1365-313x.2006.02829.x

Цитирования и источники

Цитирований: 4Использованных источников: 0

Показатели — AkademScholar