Genetic characterization and pigment content of two chlorotica mutants isolated from in vitro regenerated plants of sunflower (Helianthus annuus L.)
2002
Fambrini, M. | Salvini, M. | Bertini, D. | Pugliesi, C. (Ecole Nationale Superieure Agronomique de Toulouse, Castanet (France). Dept. of Biotechnology and Plant Breeding)
إنجليزي. The present study was conducted to evaluate the genetic control of two mutations, induced by in vitro tissue culture, that affect the photosynthetic pigments content of sunflower. The genetic analysis indicated a monogenic control for both mutants, designed as chlorotica1 (chi1) and chlorotica2 (chi2). Reciprocal crosses revealed no maternal effect. In both mutants, the leaf contents of chlorophyll a (Chl a), Chl b, beta-carotene, lutein, neoxanthin and violaxanthin were significantly reduced in comparison to normal leaves. By contrast, the zeaxanthin level and the de-epoxidation state (DEPS) displayed by the leaves of both mutants were higher with respect to wild type, suggesting that in the mutants the energy adsorbed was higher than the capacity of photochemical quenching
اظهر المزيد [+] اقل [-]إيطالي. [Questo studio e' stato condotto per valutare il controllo genetico di due mutazioni, causate da una coltura di tessuti in vitro, che influenzano il contenuto di pigmenti fotosintetici del girasole. L'analisi genetica ha indicato un controllo monogenico per ambedue i mutanti, designati come chlorotica 1 (chi1) e chlorotica 2 (chi2). Gli incroci reciproci non hanno rivelato alcun effetto materno. In ambedue i mutanti, i contenuti fogliari della clorofilla a (Chl a), Chl b, beta-carotene, luteina, neoxantina e violaxantina risultavano significativamente ridotti in confronto alle foglie normali. Per contrasto, il livello di zeaxantina e lo stato di de-epossidazione (DEPS) evidenziati dalle foglie di ambedue i mutanti erano piu' elevati rispetto al tipo selvatico, suggerendo che nei mutanti l'energia assorbita era piu' alta della capacita' di estinzione fotochimica]
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Istituto di Servizi per il Mercato Agricolo Alimentare