NDLI: Time-course of photosynthetic induction in four tropical woody species grown in contrasting irradiance habitats

Content Provider	Springer Nature Link
Author	Portes, M. T. Alves, T. H. Souza, G. M.
Copyright Year	2008
Abstract	We investigated the photosynthetic induction time-course in species of different ecological groups grown in contrasting forest irradiance environments, gap and understorey, exposed to different darkness times in order to verify the plant capacity to exploit irradiance heterogeneity. Photosynthetic induction was studied in leaves of Bauhinia forficata and Guazuma ulmifolia (early succession species, ES), and Esenbeckia leiocarpa and Hymenaea courbaril (late succession species, LS). T$_{50}$ and T$_{90}$ (time estimates to attain 50 and 90 % of maximum net photosynthetic rate, respectively) varied according to the time of previous exposure to darkness and growth irradiance. In both darkness times of 10 and 30 min, T$_{50}$ was lower in the LS-than ES-species. These results, jointly with significant higher induction state of the leaves after 10 min of darkness, suggest that the LS-species has a higher potential to sunfleck utilization compared to ES-species, both grown in the understorey. After 10 and 30 min of darkness the differences between ecological groups were not clearly detected in the gap for T$_{50}$ and T$_{90}$, indicating that eco-physiological characteristics of each ecological group did not influence the induction time of the species evaluated herein. Thus the capacity to show phenotypic plasticity is not exclusive to an ecological group, but it is rather a more intrinsic feature related to the differential capacity of individuals.
Starting Page	431
Ending Page	440
Page Count	10
File Format	PDF
ISSN	03003604
Journal	Photosynthetica
Volume Number	46
Issue Number	3
e-ISSN	15739058
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-09-16
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science

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