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Titre du document / Document title

In vitro conservation of Malaysian biodiversity—achievements, challenges and future directions

Auteur(s) / Author(s)

Noor Normah M. (1 2) ; Kean Choo Wee (1 2) ; Vun Yap Lip (2 3) ; Mohamed-Hussein Zeti Azura (1 2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Malaysia
(2) School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Malaysia
(3) Faculty of Biotechnology and Life Sciences, Universiti Industri Selangor, 40000, Shah Alam, Malaysia

Résumé / Abstract

Malaysia is fortunate and proud to contain some of the world’s richest biodiversity. In Malaysia, there are an estimated 185,000 species of fauna and 12,500 species of flowering plants, many of which are endemic to tropical forests in this region. Indeed, such diversity is an important and invaluable national asset to safeguard both present and future generations. In vitro conservation offers possible techniques for the preservation of plant germplasm that at present is difficult to maintain or is maintained with limited success. Research at the Universiti Kebangsaan Malaysia (The National University of Malaysia) focuses on the cryopreservation of woody fruit species with seeds that cannot tolerate cryopreservation (recalcitrant or intermediate). Among the plants with recalcitrant seeds are such traditionally important edible tropical fruits as mangosteen, langsat, and rambai (Garcinia mangostana, Lansium domesticum, and Baccaurea motleyana). Citrus aurantifolia, Citrus suhuiensis, Citrus madurensis, Citrus hystrix, and Fortunella polyandra are among the Citrus and Citrus-related species studied. Cryopreservation studies include the Nepenthes species (pitcher plants) of Malaysia. Fundamental research on desiccation and low-temperature tolerance and on the physiology of desiccation are used to understand seed behavior, a prerequisite for the development of successful conservation techniques. At the same time, cryopreservation protocols for several Citrus and forestry species were developed for embryonic axes and adventitious shoots, mainly using rapid dehydration and PVS2 vitrification techniques. There are no successful standard techniques or protocols for species with highly recalcitrant seeds such as Garcinia species. Modification of existing protocols or development of new methods is required, but this can be accomplished only when a detailed understanding of the recalcitrant nature of the seeds or explants is achieved. While we have considerable knowledge concerning the basics of biochemical processes and some molecular data from work on desiccation-tolerant seeds, a great need remains for understanding the cause of the recalcitrance or desiccation sensitivity of these seeds. It may be necessary to use a systems biology approach that exploits the “omics” technologies to generate global molecular data. In combination with bioinformatics for data integration and analyses, this approach would move toward improved modeling of the biological pathways associated with the development of recalcitrant seeds.

Revue / Journal Title

In vitro cellular and developmental biology - Plant    ISSN  1475-2689 

Source / Source

2011, vol. 47, no1, pp. 26-36 [11 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

CSA, Bethesda, MA, ETATS-UNIS  (20?) (Revue)

Mots-clés d'auteur / Author Keywords

Cryopreservation

;

Recalcitrant seeds

;

Embryonic axes

;

Shoot tips

;

Localisation / Location

35400060711646.0003

The Society for In Vitro Biology, 2011
Nº notice refdoc (ud4) : 23801316



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