TY - JOUR
T1 - Cytokinin oxidase/dehydrogenase (CKX) activity in wild and ethylene-insensitive mutant eti5 type of Arabidopsis thaliana (L.) Heynh plants and the effect of cytokinin N-1-(2-chloro-4-pyridyl)-N-2phenylurea on enzymatic activity and leaf morphology
AU - Todorova, Dessislava
AU - Vaseva-Gemisheva, Irina
AU - Petrov, Petar
AU - Stoynova-Bakalova, Ekateria
AU - Alexieva, Vera
AU - Karanov, Emanuil
AU - Smith, Aileen R.
AU - Hall, Michael
N1 - Todorova, D., Vaseva-Gemisheva, I., Petrov, P., Stoynova-Bakalova, E., Alexieva, V., Karanov, E., Smith, A., Hall, M. (2006). Cytokinin oxidase/dehydrogenase (CKX) activity in wild and ethylene-insensitive mutant eti5 type of Arabidopsis thaliana (L.) Heynh plants and the effect of cytokinin N-1-(2-chloro-4-pyridyl)-N-2phenylurea on enzymatic activity and leaf morphology. Acta Physiologiae Plantarum, 28, (6), 613-617.
PY - 2007/6/19
Y1 - 2007/6/19
N2 - The specific activity of cytokinin oxidase/dehydrogenase (EC 1.5.99.12) (CKX) was determined in leaves of wild type (wt) and ethylene-insensitive mutant (eti5) of Arabidopsis thaliana (L.) Heynh plants. Comparative studies showed that this mutation has lower basal CKX activity than wt. Application of 4PU-30 (N1-(2-chloro-4-pyridyl)-N2-phenylurea) resulted in decreased CKX activity in both wt and mutant plants. The treatment increased leaf blade thickness and the volume of chlorophyll-containing cells per unit leaf area in wt but these changes were not observed in the eti5 mutant. The reduction in chlorophyll “a” and “b”, as well as in carotenoids content in the treated wt tissues resulting from altered leaf morphology was not detected in eti5 plants.
AB - The specific activity of cytokinin oxidase/dehydrogenase (EC 1.5.99.12) (CKX) was determined in leaves of wild type (wt) and ethylene-insensitive mutant (eti5) of Arabidopsis thaliana (L.) Heynh plants. Comparative studies showed that this mutation has lower basal CKX activity than wt. Application of 4PU-30 (N1-(2-chloro-4-pyridyl)-N2-phenylurea) resulted in decreased CKX activity in both wt and mutant plants. The treatment increased leaf blade thickness and the volume of chlorophyll-containing cells per unit leaf area in wt but these changes were not observed in the eti5 mutant. The reduction in chlorophyll “a” and “b”, as well as in carotenoids content in the treated wt tissues resulting from altered leaf morphology was not detected in eti5 plants.
U2 - 10.1007/s11738-006-0057-3
DO - 10.1007/s11738-006-0057-3
M3 - Article
SN - 1861-1664
VL - 28
SP - 613
EP - 617
JO - Acta Physiologiae Plantarum
JF - Acta Physiologiae Plantarum
IS - 6
ER -