Altitude-related changes in activities of carbon metabolism enzymes in Rumex nepalensis

Kumar, Niraj; Vats, Surender Kumar; Kumar, Sanjay; Ahuja, Paramvir Singh

doi:10.1007/s11099-008-0102-0

Cited by 9 publications

(5 citation statements)

References 34 publications

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“…In addition to studies on species distribution and composition of plant communities (Halbritter et al 2013, Read et al 2014, genomic divergence (Chapman et al 2013), and interactions between host plant and herbivores or fungal pathogens (Hodkinson 2005), attention has also been given to the acclimation of morphological, biochemical and physiological traits of plants along an altitudinal gradient (e.g., Sakata et al 2006, Kumar et al 2008, Guerin et al 2012. While these studies have focused mainly on herbaceous species and agricultural crops, possible differences in acclimation of leaves across the vertical profile of the forest canopy to growth conditions had not been studied.…”

Section: Introductionmentioning

confidence: 99%

“…Other studies have reported increases in stomatal density, stomatal conductance, and light-saturated rate of CO 2 assimilation with increasing altitude (Hultine andMarshall 2000, Vats et al 2009). Moreover, the maximum rates of Rubisco carboxylase activity and of photosynthetic electron transport have been shown to be higher for leaves from plants grown at high altitudes than for those grown at low altitudes (Fan et al 2011), even as the activities of other enzymes associated with carbon assimilation have not shown significant differences with changing altitude (Kumar et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Morphological, biochemical and physiological traits of upper and lower canopy leaves of European beech tend to converge with increasing altitude

et al. 2015

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The present work has explored for the first time acclimation of upper versus lower canopy leaves along an altitudinal gradient. We tested the hypothesis that restrictive climatic conditions associated with high altitudes reduce within-canopy variations of leaf traits. The investigated beech (Fagus sylvatica L.) forest is located on the southern slope of the Hrubý Jeseník Mountains (Czech Republic). All measurements were taken on leaves from upper and lower parts of the canopy of mature trees (>85 years old) growing at low (400 m above sea level, a.s.l.), middle (720 m a.s.l.) and high (1100 m a.s.l.) altitudes. Compared with trees at higher altitudes, those growing at low altitudes had lower stomatal conductance, slightly lower CO(2) assimilation rate (A(max)) and leaf mass per area (LMA), and higher photochemical reflectance index, water-use efficiency and Rubisco content. Given similar stand densities at all altitudes, the different growth conditions result in a more open canopy and higher penetration of light into lower canopy with increasing altitude. Even though strong vertical gradients in light intensity occurred across the canopy at all altitudes, lower canopy leaves at high altitudes tended to acquire the same morphological, biochemical and physiological traits as did upper leaves. While elevation had no significant effect on nitrogen (N) and carbon (C) contents per unit leaf area, LMA, or total content of chlorophylls and epidermal flavonoids in upper leaves, these increased significantly in lower leaves at higher altitudes. The increases in N content of lower leaves were coupled with similar changes in A(max). Moreover, a high N content coincided with high Rubisco concentrations in lower but not in upper canopy leaves. Our results show that the limiting role of light in lower parts of the canopy is reduced at high altitudes. A great capacity of trees to adjust the entire canopy is thus demonstrated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological, biochemical and physiological traits of upper and lower canopy leaves of European beech tend to converge with increasing altitude

et al. 2015

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“…In our case, the synthesis of compounds like acetylportentol found in C. pinnatifida growing at 800 m may be more favoured than those of the sesquiterpene lactone calein A. The abiotic factors described above can influence enzyme activities involved in carbon metabolism (Kumar et al 2008) and in secondary metabolite synthesis (Earnshaw et al 1987;Misra et al 2011). Mapping of metabolic and enzymatic networks have shown that metabolic pathways differ with altitude (Zhao et al 2019).…”

Section: Figmentioning

confidence: 63%

Chemical fingerprinting of the Brazilian medicinal plant Calea pinnatifida (R. Br.) Less. (Asteraceae) collected at different altitudes

Costa

Gadea

Antunes

et al. 2022

Natural Product Research

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…In C 3 plants, the ratio of Rubisco to PEPCase is 15:1, and enzyme PEPCase may play a minor role in recapturing respiratory CO 2 in tissues from developing fruits and seeds (Latzko andKelly 1983, Häusler et al 2002). Whereas in C 4 plants, the Rubisco to PEPCase ratio is 1:1 (Latzko and Kelly 1983, Melzer and O'Leary 1987), which highlights the role and significance of PEPCase in C 4 species.…”

Section: Overexpression Of C 4 Enzymesmentioning

confidence: 99%

CO<sub>2</sub> sequestration in plants: lesson from divergent strategies

Vats¹,

Kumar²,

Ahuja³

2011

Photosynt.

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Most organisms inhabiting earth feed directly or indirectly on the products synthesized by the reaction of photosynthesis, which at the current atmospheric CO 2 levels operates only at two thirds of its peak efficiency. Restricting the photorespiratory loss of carbon and thereby improving the efficiency of photosynthesis is seen by many as a good option to enhance productivity of food crops. Research during last half a century has shown that several plant species developed CO 2 -concentrating mechanism (CCM) to restrict photorespiration under lower concentration of available CO 2 . CCMs are now known to be operative in several terrestrial and aquatic plants, ranging from most advanced higher plants to algae, cyanobacteria and diatoms. Plants with C 4 pathway of photosynthesis (where four-carbon compound is the first product of photosynthesis) or crassulacean acid metabolism (CAM) may consistently operate CCM. Some plants however can undergo a shift in photosynthetic metabolism only with change in environmental variables. More recently, a shift in plant photosynthetic metabolism is reported at high altitude where improved efficiency of CO 2 uptake is related to the recapture of photorespiratory loss of carbon. Of the divergent CO 2 assimilation strategies operative in different oraganisms, the capacity to recapture photorespiratory CO 2 could be an important approach to develop plants with efficient photosynthetic capacity.

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Altitude-related changes in activities of carbon metabolism enzymes in Rumex nepalensis

Cited by 9 publications

References 34 publications

Morphological, biochemical and physiological traits of upper and lower canopy leaves of European beech tend to converge with increasing altitude

Morphological, biochemical and physiological traits of upper and lower canopy leaves of European beech tend to converge with increasing altitude

Chemical fingerprinting of the Brazilian medicinal plant Calea pinnatifida (R. Br.) Less. (Asteraceae) collected at different altitudes

CO<sub>2</sub> sequestration in plants: lesson from divergent strategies

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