Abstract
Root growth regulation plays a crucial role in the acclimatization of plants to their surroundings, but the molecular mechanisms underlying this process remain largely uncertain. Teosinte branched1/cycloidea/proliferating cell factor (TCP) transcription factors are crucial elements linking together plant growth and development, phytohormone signaling, and stress response. In this study, 15 TCP transcription factors were identified in the mulberry (Morus alba) genome. Gene structure, conserved motif, and phylogenetic analyses revealed the conservation and divergence of these MaTCPs, thus providing insights into their functions. A promoter analysis uncovered distinct numbers and compositions of cis-elements in MaTCP gene promoter regions that may be connected to reproductive growth and phytohormone and stress responses. An expression pattern analysis of the 15 MaTCP genes in mulberry roots indicated that transcriptional levels of MaTCP2, MaTCP4-1, MaTCP8, MaTCP9-1, and MaTCP20-2 are correlated with root development. As revealed by changes in their expressions after drought treatment, these five MaTCP genes are involved in root growth and may increase mulberry tolerance to drought. Our findings lay the foundation for future functional studies of these genes.
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Claims 9
Claim · model-written summary
Fifteen TCP transcription factors were identified in the mulberry genome.
Verbatim
e0“15 TCP transcription factors were identified in the mulberry (Morus alba) genome”
Claim · model-written summary
Gene structure, motif, and phylogenetic analyses revealed conservation and divergence of MaTCPs.
Verbatim
e0“Gene structure, conserved motif, and phylogenetic analyses revealed the conservation and divergence of these MaTCPs”
t0“Mulberry”
Claim · model-written summary
MaTCP promoter regions contained distinct numbers and compositions of cis-elements potentially linked to growth and stress responses.
Verbatim
e0“distinct numbers and compositions of cis-elements in MaTCP gene promoter regions that may be connected to reproductive growth and phytohormone and stress responses”
t0“Mulberry”
Claim · model-written summary
MaTCP2 transcription was correlated with mulberry root development.
Not reportedDirection
Verbatim
e0“transcriptional levels of MaTCP2, MaTCP4-1, MaTCP8, MaTCP9-1, and MaTCP20-2 are correlated with root development”
t0“Mulberry”
Claim · model-written summary
MaTCP4-1 transcription was correlated with mulberry root development.
Not reportedDirection
Verbatim
e0“transcriptional levels of MaTCP2, MaTCP4-1, MaTCP8, MaTCP9-1, and MaTCP20-2 are correlated with root development”
t0“Mulberry”
Claim · model-written summary
MaTCP8 transcription was correlated with mulberry root development.
Not reportedDirection
Verbatim
e0“transcriptional levels of MaTCP2, MaTCP4-1, MaTCP8, MaTCP9-1, and MaTCP20-2 are correlated with root development”
t0“Mulberry”
Claim · model-written summary
MaTCP9-1 transcription was correlated with mulberry root development.
Not reportedDirection
Verbatim
e0“transcriptional levels of MaTCP2, MaTCP4-1, MaTCP8, MaTCP9-1, and MaTCP20-2 are correlated with root development”
t0“Mulberry”
Claim · model-written summary
MaTCP20-2 transcription was correlated with mulberry root development.
Not reportedDirection
Verbatim
e0“transcriptional levels of MaTCP2, MaTCP4-1, MaTCP8, MaTCP9-1, and MaTCP20-2 are correlated with root development”
t0“Mulberry”
Claim · model-written summary
Drought-responsive expression suggested that five MaTCP genes are involved in root growth and may increase mulberry drought tolerance.
Verbatim
e0“these five MaTCP genes are involved in root growth and may increase mulberry tolerance to drought”