Tan, J, Walford, S-A, Dennis, ES & Llewellyn, DJ 2020, 'Trichomes at the Base of the Petal are Regulated by the Same Transcription Factors as Cotton Seed Fibers.', Plant & cell physiology.View/Download from: Publisher's site
Many polypetalous plants have a constriction at the base of the petal that leaves a small gap that can provide entry into the young flower bud before the reproductive organs are fully developed. In cotton (Gossypium hirsutum L.) this gap is occluded by tufts of short unicellular trichomes superficially resembling the fibers found on cotton seeds. We are just beginning to understand the developmental regulation of the seed fibers and have previously characterized several MIXTA-like MYB transcription factors (TFs) that are critical for correct seed fiber development but know little about the molecular regulation of other types of cotton trichomes. Here, using RNAi or dominant suppression transgenic cotton lines and natural fiber mutants, we investigated the development and regulation of the petal base trichomes. Petal base trichomes and seed trichomes were also examined across several different species within and outside of the Malvoideae. We found that the petal base trichomes are regulated by the same MYB TFs as cotton seed fibers and since they are more widely distributed across different taxa than the seed fibers, could have preceded them in the evolution of these important textile fibers produced by some cotton species.
Wang, L, Liu, P-C, Wu, LM, Tan, J, Peacock, WJ & Dennis, ES 2019, 'Cotyledons contribute to plant growth and hybrid vigor in Arabidopsis.', Planta, vol. 249, pp. 1107-1118.View/Download from: Publisher's site
MAIN CONCLUSION:In hybrids of Arabidopsis, cotyledons influence the amount and proportion of hybrid vigor in total plant growth. We found Arabidopsis cotyledons are essential for plant growth and in some hybrids for hybrid vigor. In hybrids between C24 and Landsberg erecta (Ler), biomass vigor (heterosis) occurs in the first few days after sowing (DAS), with hybrid cotyledons being larger than those of their parents. C24xLer hybrids are ahead of their parents in activating photosynthesis and auxin pathway genes in cotyledons at 3-4 DAS. "Earliness" is also present in newly emerged C24xLer hybrid leaves. We showed cotyledon removal at 4 DAS caused significant biomass reduction in later growth in hybrids and parental lines. The biomass decrease caused by cotyledon removal can be partially rescued by exogenous sucrose or auxin with different genotypes responding to sucrose and/or auxin differently. Cotyledon removal has different effects on heterosis in different hybrids. After cotyledon removal, in C24xLer hybrids, both growth and heterosis were reduced in similar proportions, but the level of hybrid vigor was reduced as a proportion of growth in C24xColumbia (Col) and ColxLer hybrids. The removal of cotyledons at 4 DAS markedly decreased the level of growth and eliminated the heterotic phenotype of Wassilewskija (Ws)/Ler hybrids. In mutant Ws/Ler hybrids which had a reduced level of photosynthesis in the cotyledons, there was a reduction in plant growth and loss of heterosis. The variation in contribution of cotyledons to heterosis in different hybrids indicates there are multiple pathways to achieve heterotic phenotypes.
Wang, P, Zhang, J, Sun, L, Ma, Y, Xu, J, Liang, S, Deng, J, Tan, J, Zhang, Q, Tu, L, Daniell, H, Jin, S & Zhang, X 2018, 'High efficient multisites genome editing in allotetraploid cotton (Gossypium hirsutum) using CRISPR/Cas9 system', PLANT BIOTECHNOLOGY JOURNAL, vol. 16, no. 1, pp. 137-150.View/Download from: Publisher's site
Li, Y, Tu, L, Pettolino, FA, Ji, S, Hao, J, Yuan, D, Deng, F, Tan, J, Hu, H, Wang, Q, Llewellyn, DJ & Zhang, X 2016, 'GbEXPATR, a species-specific expansin, enhances cotton fibre elongation through cell wall restructuring', PLANT BIOTECHNOLOGY JOURNAL, vol. 14, no. 3, pp. 951-963.View/Download from: Publisher's site
Han, J, Tan, J, Tu, L & Zhang, X 2014, 'A peptide hormone gene, GhPSK promotes fibre elongation and contributes to longer and finer cotton fibre', PLANT BIOTECHNOLOGY JOURNAL, vol. 12, no. 7, pp. 861-871.View/Download from: Publisher's site
Tang, W, Tu, L, Yang, X, Tan, J, Deng, F, Hao, J, Guo, K, Lindsey, K & Zhang, X 2014, 'The calcium sensor GhCaM7 promotes cotton fiber elongation by modulating reactive oxygen species (ROS) production', NEW PHYTOLOGIST, vol. 202, no. 2, pp. 509-520.View/Download from: Publisher's site
Tan, J, Tu, L, Deng, F, Hu, H, Nie, Y & Zhang, X 2013, 'A Genetic and Metabolic Analysis Revealed that Cotton Fiber Cell Development Was Retarded by Flavonoid Naringenin', PLANT PHYSIOLOGY, vol. 162, no. 1, pp. 86-95.View/Download from: Publisher's site
Wang, M, Yuan, D, Gao, W, Li, Y, Tan, J & Zhang, X 2013, 'A Comparative Genome Analysis of PME and PMEI Families Reveals the Evolution of Pectin Metabolism in Plant Cell Walls', PLOS ONE, vol. 8, no. 8.View/Download from: Publisher's site
Deng, F, Tu, L, Tan, J, Li, Y, Nie, Y & Zhang, X 2012, 'GbPDF1 Is Involved in Cotton Fiber Initiation via the Core cis-Element HDZIP2ATATHB2', PLANT PHYSIOLOGY, vol. 158, no. 2, pp. 890-904.View/Download from: Publisher's site
Hao, J, Tu, L, Hu, H, Tan, J, Deng, F, Tang, W, Nie, Y & Zhang, X 2012, 'GbTCP, a cotton TCP transcription factor, confers fibre elongation and root hair development by a complex regulating system', JOURNAL OF EXPERIMENTAL BOTANY, vol. 63, no. 17, pp. 6267-6281.View/Download from: Publisher's site
Liu, G, Jin, S, Liu, X, Tan, J, Yang, X & Zhang, X 2012, 'Overexpression of Arabidopsis cyclin D2;1 in cotton results in leaf curling and other plant architectural modifications', PLANT CELL TISSUE AND ORGAN CULTURE, vol. 110, no. 2, pp. 261-273.View/Download from: Publisher's site
Tan, J, Tu, L, Deng, F, Wu, R & Zhang, X 2012, 'Exogenous Jasmonic Acid Inhibits Cotton Fiber Elongation', JOURNAL OF PLANT GROWTH REGULATION, vol. 31, no. 4, pp. 599-605.View/Download from: Publisher's site
Munis, MFH, Tu, L, Ziaf, K, Tan, J, Deng, F & Zhang, X 2010, 'CRITICAL OSMOTIC, IONIC AND PHYSIOLOGICAL INDICATORS OF SALINITY TOLERANCE IN COTTON (GOSSYPIUM HIRSUTUM L.) FOR CULTIVAR SELECTION', PAKISTAN JOURNAL OF BOTANY, vol. 42, no. 3, pp. 1685-1694.
Li, Y, Liu, D, Tu, L, Zhang, X, Wang, L, Zhu, L, Tan, J & Deng, F 2010, 'Suppression of GhAGP4 gene expression repressed the initiation and elongation of cotton fiber', PLANT CELL REPORTS, vol. 29, no. 2, pp. 193-202.View/Download from: Publisher's site
Munis, MFH, Tu, L, Deng, F, Tan, J, Xu, L, Xu, S, Long, L & Zhang, X 2010, 'A thaumatin-like protein gene involved in cotton fiber secondary cell wall development enhances resistance against Verticillium dahliae and other stresses in transgenic tobacco', BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, vol. 393, no. 1, pp. 38-44.View/Download from: Publisher's site
Zhu, H, Tu, L, Jin, S, Xu, L, Tan, J, Deng, F & Zhang, X 2008, 'Analysis of genes differentially expressed during initial cellular dedifferentiation in cotton', CHINESE SCIENCE BULLETIN, vol. 53, no. 23, pp. 3666-3676.View/Download from: Publisher's site
Tu, LL, Zhang, XL, Liang, SG, Liu, DQ, Zhu, LF, Zeng, FC, Nie, YC, Guo, XP, Deng, FL, Tan, JF & Xu, L 2007, 'Genes expression analyses of sea-island cotton (Gossypium barbadense L.) during fiber development', Plant Cell Reports, vol. 26, no. 8, pp. 1309-1320.View/Download from: Publisher's site
Sea-island cotton (Gossypium barbadense L.) is one of the most valuable cotton species due to its silkiness, luster, long staples, and high strength, but its fiber development mechanism has not been surveyed comprehensively. We constructed a normalized fiber cDNA library (from -2 to 25 dpa) of G. barbadense cv. Pima 3-79 (the genetic standard line) by saturation hybridization with genomic DNA. We screened Pima 3-79 fiber RNA from five developmental stages using a cDNA array including 9,126 plasmids randomly selected from the library, and we selected and sequenced 929 clones that had different signal intensities between any two stages. The 887 high-quality expressed sequence tags obtained were assembled into 645 consensus sequences (582 singletons and 63 contigs), of which 455 were assigned to functional categories using gene ontology. Almost 50% of binned genes belonged to metabolism functional categories. Based on subarray analysis of the 887 high-quality expressed sequence tags with 0-, 5-, 10-, 15-, and 20-dpa RNA of Pima 3-79 fibers and a mixture of RNA of nonfiber tissues, seven types of expression profiles were elucidated. Furthermore our results showed that phytohormones may play an important role in the fiber development. © 2007 Springer-Verlag.