Parameters affecting the early seedling development of four neotropical trees under oxygen deprivation stress

Kolb, Rosana Marta; Rawyler, André; Brändle, Roland (2002). Parameters affecting the early seedling development of four neotropical trees under oxygen deprivation stress. Annals of Botany, 89(5), pp. 551-558. Oxford University Press 10.1093/aob/mcf092

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Some of the parameters that determine flooding resistance-and consequently habitat zonation-were investigated in four neotropical trees (Schizolobium parahyba, Sebastiania commersoniana, Erythrina speciosa and Sesbania virgata). The constitutive parameters of seeds (size, nature and amount of reserves) only partly influenced resistance to flooding, mainly through a high carbohydrate : size ratio. Parameters describing metabolic efficiency under stress conditions were more important. Among them, fermentation capacity and levels of ATP and of total adenylates played a key role. The highest resistance to anoxia was associated with increased availability of free sugars, elevated alcohol dehydrogenase activity and corresponding mRNA levels, more efficient removal of ethanol and lactate, and higher adenylate levels. Finally, as a lethal consequence of energy shortage, free fatty acids were released on a massive scale in the flooding-sensitive species Schizolobium parahyba, whereas lipid hydrolysis did not occur in the most resistant species Sesbania virgata. (C) 2002 Annals of Botany Company.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Anoxia / Postanoxia [discontinued]
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Brändle, Roland

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0305-7364

Publisher:

Oxford University Press

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

07 Mar 2017 08:00

Last Modified:

23 Oct 2019 18:11

Publisher DOI:

10.1093/aob/mcf092

Uncontrolled Keywords:

adenylate levels, energy shortage, fermentation capacity, flooding resistance, habitat zonation, lipid hydrolysis, metabolism; seed reserves, Erythrina speciosa, Schizolobium parahyba, Sebastiania commersoniana, Sesbania virgata

BORIS DOI:

10.7892/boris.91790

URI:

https://boris.unibe.ch/id/eprint/91790

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