11/8/2022 0 Comments Fuzz acid and flowers pdf![]() The presence of a threonine residue at position 15 of the TCP domain is responsible for the distinct DNA-binding properties of AtTCP11 ( Viola et al., 2011). The expression of a repressor form of AtTCP11 resulted in smaller and curly leaves, shorter petioles, pedicels, and siliques, as well as a higher proportion of abnormal seeds and pollens. AtTCP2, AtTCP3, AtTCP11, and AtTCP15 were found to participate in the regulation of circadian clock by interacting with different components ( Giraud et al., 2010). GhTCP12, GhTCP13, and GhTCP18 are functionally redundant in controlling branching in cotton and Arabidopsis ( Diao et al., 2019). AtTCP14 and AtTCP15 redundantly modulate internode elongation and leaf shape in Arabidopsis ( Kieffer et al., 2011). One of the founding members of the TCP family, AmCYC, controls floral asymmetry ( Luo et al., 1996). They have been shown to be involved in a wide range of biological processes throughout the entire life span of plants. ![]() The TCP transcription family can be categorized into two subfamilies, namely class I and class II, based on sequence similarities of the TCP domain, which act as activators or repressors by the formation of homodimers or heterodimers ( Kosugi and Ohashi, 2002). The main feature of TCP proteins is a conserved non-canonical basic-Helix-Loop-Helix structure near the N-terminus, known as the TCP domain, which is consisting of approximately 60 amino-acid residues ( Cubas et al., 1999). TCP transcription factors are plant-specific developmental regulators, named according to the first four characterized members of the family, namely maize ( Zea mays) TEOSINTE BRANCHED1, snapdragon ( Antirrhinum majus) CYCLOIDEA, and rice ( Oryza sativa) PROLIFERATING CELL NUCLEAR ANTIGEN FACTOR1 and 2. The results suggest that GrTCP11 may be an important transcription factor for cotton fiber development, by negatively regulating JA biosynthesis and response. As with the JA-deficient mutant dde2-2, the transgenic line 4-1 was insensitive to 50 μM methyl jasmonate, compared with the wild-type plants. It was found that GrTCP11 negatively regulated genes involved in jasmonic acid (JA) biosynthesis and response, such as AtLOX4, AtAOS, AtAOC1, AtAOC3, AtJAZ1, AtJAZ2, AtMYC2, and AtERF1, which resulted in a decrease in JA concentration in the overexpressed transgenic lines. Overexpression of GrTCP11 in Arabidopsis thaliana reduced root hair length and delayed flowering. GrTCP11, an ortholog of AtTCP11, was preferentially expressed in cotton anthers and during fiber initiation and secondary cell wall synthesis stages. Here, we identified a total of 37 non-redundant TCP proteins from the diploid cotton ( Gossypium raimondii), which showed great diversity in the expression profile. ![]() However, the functional mechanisms of TCPs are not well understood, especially in cotton fibers. TCP transcription factors play important roles in diverse aspects of plant development as transcriptional activators or repressors. Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, Hangzhou Normal University, Hangzhou, China.Juan Hao, Panpan Lou, Yidie Han, Zhehao Chen, Jianmei Chen, Jun Ni, Yanjun Yang, Zhifang Jiang and Maojun Xu * ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |