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The polycotyledon ( pct1‐2 ) mutant of tomato shows enhanced accumulation of PIN1 auxin transport facilitator protein
Author(s) -
Kharshiing E. V.,
Kumar G. P.,
Ditengou F. A.,
Li X.,
Palme K.,
Sharma R.
Publication year - 2010
Publication title -
plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 1435-8603
DOI - 10.1111/j.1438-8677.2009.00267.x
Subject(s) - auxin , biology , hypocotyl , mutant , pin1 , polar auxin transport , microbiology and biotechnology , botany , biochemistry , gene , arabidopsis , isomerase
The bilateral symmetry of a dicotyledon embryo is tightly associated with the directional flow of auxin. Disruption of polar auxin flow results in various developmental abnormalities. The pct1‐2 mutant of tomato, showing polycotyledony, also has enhanced polar auxin transport in hypocotyls. Immunocytochemical analysis revealed increased PIN1 protein in pct1‐2 roots and hypocotyls. The mutant also displayed an increase in PIN1 transcript levels in these organs. Our results indicate that over‐accumulation of PIN1 protein is likely related to increased polar transport of auxin in the pct1‐2 mutant.