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Thermal acclimation of leaf respiration varies between legume and non-legume herbaceous

Journal of Plant Ecology 2019年第3期12卷 498-506页

作者： Fei Peng Chang Gyo Jung Lifen Jiang Xian Xue Yiqi Luo Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhouGansu 730000China International Platform for Dryland Research and Education Arid Land Research CenterTottori University1390 HamasakaTottori 680-0001Japan College of Engineering Forestryand Natural SciencesNorthern Arizona UniversityFlagstaffAS 86011USA

Aims Ubiquitous thermal acclimation of leaf respiration could mitigate the respiration ***,whether species of different plant functional groups showing distinct or similar acclimation justifies the simple prediction of respiratory carbon(C)loss to a warming *** In this study,leaf dark respiration(Rd)of illinois bundleflower(IB,legume),stiff goldenrod(GR,C_(3) forbs),indian grass,little bluestem and king ranch bluestem(IG,LB and KB,C_(4) grass)were measured with detached leaves sampled in a 17-year warming *** Findings The results showed that Rd at 20℃ and 22℃(R_(20) and R_(22))were significantly lower in the warming treatment for all the five *** R_(22) in warmed than R_(20) in control in GR,KB,LB and IG imply acclimation homeostasis,but not in *** significant decline in temperature sensitivity of respiration(Q_(10))of GR resulted in the marginal reduction of Q_(10) across *** significant changes in Q_(10) of C_(4) grasses suggest different acclimation types for C_(3) forbs and C_(4) *** magnitude of acclimation positively correlated with leaf C/*** results suggest that non-legume species had a rela-tive high acclimation,although the acclimation type was different between C_(3) forbs and C_(4) grasses,and the legume species displayed no acclimation in ***,the plant functional types should be taken into account in the grassland ecosystem C models.

关键词： acclimation dark respiration warming legume plant functional types

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Leaf Gas Exchange,Photon Capture and Light Harvest in Aldina heterophylla along a Vegetation Gradient in the Amazon Rainforest

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American Journal of Plant Sciences 2014年第10期5卷 1477-1488页

作者： Joao Victor Figueiredo Cardoso Rodrigues José Francisco de Carvalho Goncalves Federal University of Amazonas Center for Distance EducationManausBrazil Laboratory of Plant Physiology and Biochemistry National Institute for Research in the AmazonManausBrazil

Adaptation along environmental gradients is presumed to induce physiological and biochemical leaf changes in plant species. In this paper, we report how leaf gas exchange, photon capture and light harvest for photosynthesis in Aldina heterophylla change along a vegetation gradient from low stature open vegetation on extremely nutrient-poor white sand (Campina, CP), through inter-mediate closet type (Campinarana, CR) to tall closed rain forest (RF). The pigment concentrations did not differ between the CP, CR and RF habitats. The performance index for the photosynthesis (PIABS) of individuals in RF and CP was approximately 30% higher than that in CR individuals. This species showed similar potential rates of photosynthesis in the different vegetation types;however, the dark respiration rates were higher in CP. Our results indicate that the differences in the leaves and soil nitrogen concentrations are not enough to change the levels of gas exchange. Other environmental features may be driving the observed morphological features in this gradient, in particular, the tree height.

关键词： Chloroplast Pigments dark respiration Net Photosynthesis Physiological Plasticity Tropical Forest Biomass Accumulation

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