Vegetative phase change
Vegetative phase change is the juvenile-to-adult transition in plants.[1]
This transition is distinct from the reproductive transition and is most prolonged and pronounced in woody species. Manipulating phase change may be an important avenue for plant improvement.[2]
In the model plant Arabidopsis thaliana, vegetative phase change is relatively subtle: leaves become more curled, with an increased number of abaxial trichomes, and increased serration.[3] Studies in A. thaliana and maize identified microRNA MIR156 genes as master regulators of phase change, through their regulation of SQUAMOSA-PROMOTER-BINDING-LIKE (SBP/SPL) transcription factors.[4][5] This gene regulatory circuit appears to be conserved (with variations) in all land plants, including mosses.[1]
See also
- Plant morphology
- Heteroblasty
References
^ ab Poethig, R. S. (2010). "The past, present, and future of vegetative phase change". Plant Physiology. 154 (2): 541–544. doi:10.1104/pp.110.161620. PMC 2949024. PMID 20921181..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ Chuck, G. S.; Tobias, C.; Sun, L.; Kraemer, F.; Li, C.; Dibble, D.; Arora, R.; Bragg, J. N.; Vogel, J. P.; Singh, S.; Simmons, B. A.; Pauly, M.; Hake, S. (2011). "Overexpression of the maize Corngrass1 microRNA prevents flowering, improves digestibility, and increases starch content of switchgrass". Proceedings of the National Academy of Sciences. 108 (42): 17550. doi:10.1073/pnas.1113971108. PMC 3198312. PMID 21987797.
^ Telfer, A.; Bollman, K. M.; Poethig, R. S. (1997). "Phase change and the regulation of trichome distribution in Arabidopsis thaliana". Development. 124 (3): 645–654. PMID 9043079.
^ Wu, G.; Poethig, R. S. (2006). "Temporal regulation of shoot development in Arabidopsis thaliana by miR156 and its target SPL3". Development. 133 (18): 3539–3547. doi:10.1242/dev.02521. PMC 1610107. PMID 16914499.
^ Chuck, G.; Cigan, A. M.; Saeteurn, K.; Hake, S. (2007). "The heterochronic maize mutant Corngrass1 results from overexpression of a tandem microRNA". Nature Genetics. 39 (4): 544–549. doi:10.1038/ng2001. PMID 17369828.
