Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Effects of applied ABA on growth cessation, bud dormancy, cold acclimation, leaf senescence and N mobilization in apple nursery plants
Autore:
Guak, S; Fuchigami, LH;
Indirizzi:
Oregon State Univ, Dept Hort, Corvallis, OR 97331 USA Oregon State Univ Corvallis OR USA 97331 pt Hort, Corvallis, OR 97331 USA
Titolo Testata:
JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY
fascicolo: 4, volume: 76, anno: 2001,
pagine: 459 - 464
SICI:
1462-0316(200107)76:4<459:EOAAOG>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENDOGENOUS ABSCISIC-ACID; PROTEINS; STORAGE; PHOTOPERIOD; TOLERANCE; INDUCTION; POPLAR; BETULA; MALUS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Fuchigami, LH Oregon State Univ, Dept Hort, ALS 4017, Corvallis, OR 97331 USA Oregon State Univ ALS 4017 Corvallis OR USA 97331 97331 USA
Citazione:
S. Guak e L.H. Fuchigami, "Effects of applied ABA on growth cessation, bud dormancy, cold acclimation, leaf senescence and N mobilization in apple nursery plants", J HORT SCI, 76(4), 2001, pp. 459-464

Abstract

Commercial tree fruit nurseries can promote aggressive tree growth by adding greater amounts of N than is necessary. Although this practice may produce the largest stock possible, it often causes physiological problems such as delays in growth cessation, bud dormancy development, and cold acclimation, especially in late apple cultivars. In this study, abscisic acid (ABA) was applied to Fuji/M.26 apple (Males domestica Borkh.) nursery plants thathad been growing into the late season with a high N supply. We tested the hypothesis that exogenously applied ABA enhances growth cessation and that this is related to the improvement of bud dormancy development and cold acclimation. We also studied the effects on leaf senescence and mobilization of leaf N into perennial woody tissues. In September 1996, ABA at 1000 mg l(-1) plus 0.1% Tween 80 was sprayed twice, at 7 d intervals. ABA treatment significantly enhanced shoot growth cessation and advanced the early stages of bud endodormancy development; these effects were closely related. Maximum growth cessation and bud dormancy were attained in mid-December similarlyin both control and ABA treatments. In early November, stem cold hardinessmeasured by the electrolyte leakage method was significantly greater in the ABA-treated plants than in the controls, but was similar in late December. This indicated that cold acclimation was related to the depth of bud endodormancy development. N mobilization from the senescing leaves into perennial woody tissues was significantly enhanced by ABA treatment. Therefore, autumnal increases in total-N and soluble-protein concentrations were significantly higher in the ABA-treated plants (especially in the stem bark), but both control and ABA-treated plants reached similar maximum levels later when plants were completely defoliated.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 13:45:59