NDLI: Interactive effects of salinity and irradiance on photoprotection in acclimated seedlings of two sympatric mangroves

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Cuttings of Wollemi pine tolerate moderate photoinhibition and remain highly capable of root formation

Interactive effects of salinity and irradiance on photoprotection in acclimated seedlings of two sympatric mangroves

Differential response of two Central-European oak species to single and combined stress factors

Trees : Volume 19, Issue 4, June 2005

Trees : Volume 19, Issue 3, May 2005

Trees : Volume 19, Issue 2, March 2005

Trees : Volume 19, Issue 1, January 2005

Interactive effects of salinity and irradiance on photoprotection in acclimated seedlings of two sympatric mangroves

Content Provider	Springer Nature Link
Author	Christian, Rochelle
Copyright Year	2005
Abstract	The synergistic effects of irradiance and salinity on leaf angle, the photochemical efficiency of photosystem II and photosynthetic pigment composition of mangroves were studied in a factorial experiment. Seedlings of Aegiceras corniculatum (L.) Blanco (Myrsinaceae) and Avicennia marina (Forstk.) Vierh var. australasica (Walp.) Moldenke (Avicenniaceae) were grown under salinity treatments (0, 5, 25, 50, 75, and 100% artificial seawater), in full sunlight or under shade cloth (transmitting 30 or 70% sunlight), during summer and autumn. Significant species’ differences and effects of salinity and growth irradiance were found for key measures. Depressions in Fv/Fm due to salinity and growth irradiance were chronic, they were least in 25% seawater and in 30% sunlight, and greater in low and high salinity, and higher irradiance. A diurnal depression of Fv/Fm was superimposed on the chronic depression, and was greater for Ae. corniculatum than Av. marina. Increases in leaf angle; and increases in the size, and de-epoxidation state of the xanthophyll cycle pigment pool afforded protection from adverse effects of excess excitation energy. Adverse effects of the highest salinities on β,β-carotene and β,ɛ-carotene biosynthetic pathways were suggested, particularly in Ae. corniculatum. The ecological significance of differences in species’ extent and temporal patterns of response are discussed.
Starting Page	596
Ending Page	606
Page Count	11
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	19
Issue Number	5
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-03-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carotenoids Leaf angle Light Photoinhibition Xanthophyll cycle
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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