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The lld mutation in Pisum sativum used as a genetic tool to discern the plant leaflet/leaf developmental process.
- Source :
-
Indian journal of experimental biology [Indian J Exp Biol] 2013 Jun; Vol. 51 (6), pp. 421-34. - Publication Year :
- 2013
-
Abstract
- Leaves of P. sativum the double mutant genotype tendril-less (tl) leaflet-development (lld), due to the action of lld mutation, produce many leaflets that are aborted at different stages of development. Morphological, vein pattern and histological observations showed that aborted leaflets became cup/bell/trumpet (cup) shaped because of segmental differentiation in the leaflet primordium. Cup's inside lamina surface was adaxial and outer surfaces of cup and its stem were abaxial. The lld cups were phenotypically homologous to aborted leaves described in Arabidopsis thaliana mutants, angustifolia and those which underexpressed the HD-ZIP III proteins. Leaflet primordium was found to grow and establish three dimensional polarities apex-downwards. Primordium produced lateral outgrowth on one side of midvein. Differentiation, in the outgrowth of secondary veins, whose xylem tissues faced each other, established the adaxial-abaxial polarity. Lateral outgrowth then developed a cavity which got bounded by future adaxial epidermis. Further growth, veinlet formation, differentiation of palisade parenchyma and spongy parenchyma followed. Opening of lateral outgrowth at its outer midline produced a flat leaflet with lateral lamina spans. The structural and functional correspondence between leaflet and simple leaves suggested commonality between leaf and leaflet development mechanisms. A molecular model for the lld led leaflet abortion was also provided.
- Subjects :
- Pisum sativum genetics
Pisum sativum metabolism
Phenotype
Plant Leaves genetics
Plants, Genetically Modified genetics
Plants, Genetically Modified metabolism
Genetics
Mutation genetics
Pisum sativum growth & development
Plant Leaves anatomy & histology
Plant Leaves growth & development
Plants, Genetically Modified growth & development
Subjects
Details
- Language :
- English
- ISSN :
- 0019-5189
- Volume :
- 51
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Indian journal of experimental biology
- Publication Type :
- Academic Journal
- Accession number :
- 23926690