NDLI: Endogenous abscisic acid in juvenile and adult grape (Vitis vinifera L. cv. Pinot noir)

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Endogenous abscisic acid in juvenile and adult grape (Vitis vinifera L. cv. Pinot noir)

Content Provider	Semantic Scholar
Author	Langilier, P. Fournioux, J. C.
Copyright Year	2015
Abstract	Introduction: After several subcultures, grapevines growing in vitro show rejuvenation (MULLINS et al. 1979). The juvenile characters can be induced by the manipulation of culture conditions. By changing the CO2 concentration, two distinct morphological patterns were obtained (FOURNIOUX 1995): adult (phyllotaxy 1/2 and presence of tendrils) and juvenile (phyllotaxy 2/5 and lack of tendrils) micropropagated plants. Some juvenile characteristics may be preserved after acclimatization and transfer into the vineyard: leaves are more jagged, the anthocyanin content is higher and lower fertility is observed in most cultivars (GRENAN 1982). As it is difficult to determine the degree of juvenility with morphological characteristics only (FOURNIOUX et al. 1998), the use of biochemical markers should be added. The abscisic acid (ABA) content of a plant depends on age and varies during ontogenesis. ABA acts as an antagonist of gibberellic acid by maintaining the adult stage in Hedera helix (ROGLER and HACKETT 1975). It seems to be one of the factors involved in the control of flowering of Xanthium strumarium and as high levels of ABA are supposed to characterize the adult stage, low levels wouldmaintain the juvenile stage (PODOLNYI et al. 1989). We have quantified the ABA content of juvenile and adult plants cultivated in situ (greenhouse) or in vitro, with the aim to investigate the possible relationship between ABA changes and the process of juvenilisation.
Starting Page	47
Ending Page	48
Page Count	2
File Format	PDF HTM / HTML
Volume Number	39
Alternate Webpage(s)	https://ojs.openagrar.de/index.php/VITIS/article/download/4605/4483
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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