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Titolo:
Effects of micropropagation conditions of rose shootlets on chlorophyll fluorescence
Autore:
Genoud, C; Coudret, A; Amalric, C; Sallanon, H;
Indirizzi:
Lab Physiol & Biotechnol Vegetales, F-63174 Aubiere, France Lab Physiol & Biotechnol Vegetales Aubiere France F-63174 ubiere, France
Titolo Testata:
PHOTOSYNTHETICA
fascicolo: 1-2, volume: 36, anno: 1999,
pagine: 243 - 251
SICI:
0300-3604(1999)36:1-2<243:EOMCOR>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
JUGLANS-REGIA PLANTLETS; GROWN IN-VITRO; PHOTOSYNTHESIS; TOBACCO; INVITRO; ACCLIMATIZATION; POTATO; ULTRASTRUCTURE; RESPONSES; KINETICS;
Keywords:
acclimation; F-v/F-m; irradiance; net photosynthetic rate; nonphotochemical quenching; rooting; Rosa hybrida;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Sallanon, H Lab Physiol & Biotechnol Vegetales, 24 Ave Landais, F-63174 Aubiere, France Lab Physiol & Biotechnol Vegetales 24 Ave Landais Aubiere France F-63174
Citazione:
C. Genoud et al., "Effects of micropropagation conditions of rose shootlets on chlorophyll fluorescence", PHOTOSYNTHE, 36(1-2), 1999, pp. 243-251

Abstract

Rosa hybrida plantlets were rooted on solid sucrosed medium (MS) under an irradiance (PPFD) of 45 mu mol m(-2) s(-1) or on liquid hydroponic solution(MH) at 100 mu mol m(-2) s(-1). Then all plantlets were acclimated withoutsucrose under 100 mu mol m(-2) s(-1) PPFD. After 7 d in rooting stage, theratio of variable over maximal chlorophyll fluorescence (F-v/F-m) was significantly higher for plants grown in MH than in MS and hence the higher irradiance at this stage of growth had no photoinhibitory effect. The radiant energy was used by the photochemical process and also by photoprotective mechanisms of photosystem 2, expressed by increases in the rates of electron flux, net photosynthesis, and non-photochemical quenching. This effect on F-v/F-m, was maintained during three weeks in acclimation phase. The resistance of plantlets increased as new leaves formed, and after six weeks in acclimation, there was no difference between the two conditions. The study under higher irradiance (100, 150, or 300 mu mol m(-2) s(-1)) indicated that photoinhibition might take place at 300 mu mol m(-2) s(-1) whatever the growth conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 20:34:05