Is the rate of photosynthesis under blue light altered in the 7B-1 tomato mutant?

0382483 - ÚEB 2013 RIV CZ eng J - Journal Article
Ježilová, E. - Fellner, Martin - Bergougnoux, Véronique - Špundová, M.
Is the rate of photosynthesis under blue light altered in the 7B-1 tomato mutant?
Photosynthetica. Roč. 50, č. 3 (2012), s. 477-480. ISSN 0300-3604. E-ISSN 1573-9058
R&D Projects: GA ČR GD522/08/H003
Grant - others:GA ČR(CZ) GAP501/10/0785; GA MŠk(CZ) ED0007/01/01
Program: GA; ED
Institutional research plan: CEZ:AV0Z50380511
Keywords : ABA-overproducer * chlorophyll content * net photosynthetic rate
Subject RIV: CE - Biochemistry
Impact factor: 0.862, year: 2012

Changes of photosynthesis under blue light were examined in the ABA-overproducing 7B-1 mutant in tomato. Net photosynthetic rate (P (N)), stomatal conductance (g (s)), intrinsic water-use efficiency (WUEi) and chlorophyll (a+b) [Chl (a+b)] content in leaves of different insertion (1(st), 4(th) and 9(th) ones) were measured in 5-, 7- and 9-week-old plants. P (N), g (s), and Chl (a+b) content were mostly similar in young leaves of 7B-1 and wild type (WT) plants. With the aging of leaves, a blue-light-induced increase in P (N) and g (s) to steady-state was delayed and steady-state values of P (N) and g (s) were lower in 7B-1 plants compared with WT. Steady-state values of WUEi were increased in 4(th) and 9(th) leaves of 7B-1 plants compared with WT. The results can be explained by the higher endogenous level of ABA in 7B-1 plants and their lower sensitivity to ABA in earlier growth stage.
Permanent Link: http://hdl.handle.net/11104/0212691