Tagged: leaf mass per area


Cross-sections of legume leaves

Sink-source imbalance and down-regulation of photosynthesis

Sink-source imbalance could cause accumulation of total non-structural carbohydrates (TNC) and down-regulation of photosynthesis. Sugiura et al. investigate how sink-source imbalance causes photosynthetic down-regulation in soybean (Glycine max), French bean (Phaseolus vulgaris), and azuki bean (Vigna angularis). Among the three legume plants, maximum photosynthesis was down-regulated with increase in TNC only in French bean, whereas decrease in sink-source ratio caused anatomical changes and increase in cell wall content in source leaves, especially in soybean. The results suggest that down-regulation of photosynthesis is caused not only physiologically such as through a decrease in Rubisco, but also morphologically, such as through an...

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Glycine max

Intraspecific variation in soy across the leaf economics spectrum

Leaf economics traits are central in understanding and predicting the effects of plant biodiversity on ecosystem functioning. Using soybean (Glycine max) – one of the world’s most widespread crops, Hayes et al. show that leaf economics traits also differ widely among crops of the same genotype. Differences in soy leaf traits among plants can be predicted by managed environmental conditions and observed changes through plant development. The study by Hayes et al. shows that a small number of leaf traits are able to closely predict soy yield.

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Trait coordination and structural variation in Amborella trichopoda

Finding that Amborella trichopoda is sister to the rest of the angiosperms has raised the question of whether it shares certain key functional trait characteristics and plastic responses apparently widespread within the angiosperms at large. With this in mind, Trueba et al. tested the hypothesis that local canopy openness induces plastic responses in Amborella in a recent study published in AoB PLANTS. The authors provide evidence of intraspecific coordination between leaf and stem economic spectra in this key species. Moreover, by presenting the first architectural and biomechanical characterization of Amborella, their study offers new insights for the understanding of the...

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Diagram illustrating details of the leaf anatomical traits measured.

Leaf density contributes the major variation of leaf mass per area in rice

Understanding the variation of leaf anatomy and its influence on photosynthesis is very important for yield improvement. Xiong et al. found that leaf mass per area (LMA) varies greatly among rice genotypes, and the variation is mainly determined by leaf density rather than leaf thickness. Moreover, the responses of LMA and photosynthesis to nitrogen supplement are genotype dependent and are also mainly determined by leaf density. The results highlight the importance of leaf density in leaf anatomy and photosynthesis.

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Leaf traits and diease tolerance in Dutch elm hybrids

Leaf traits and disease tolerance in Dutch elm hybrids

Ophiostoma novo-ulmi, the causative agent of Dutch elm disease (DED), is able to colonize remote areas in infected plants of Ulmus such as the leaf midrib and secondary veins. Ďurkovič et al. compare leaf growth traits, primary xylem density components, gas exchange variables and chlorophyll a fluorescence yields between two Dutch elm hybrids that possess a contrasting tolerance to DED, and also employ atomic force microscopy mapping of nanomechanical properties of the cell walls of tracheary elements. They find that multivariate analysis clearly separates the two hybrids, and in the more disease-tolerant hybrid leaf growth, vascular, nanomechanical and gas exchange traits are...

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Photosynthetic thermotolerance and leaf traits

Photosynthetic thermotolerance and leaf traits

Little is known about photosynthetic thermotolerance (PT) of tropical and sub-tropical wild plants and its association with leaf phenology and persistence. Zhang et al. use the temperature-dependent increase in minimum fluorescence to assess PT for a total of 24 woody species differing in leaf flushing time in a valley-type savanna in south-west China. They find that PT is positively associated with leaf life span and foliar calcium concentration but is independent of leaf mass per unit area. The current maximum leaf temperature during extreme heat stress (44.3 °C) is close to the critical temperature of photosystem II (45.2 °C), and thus...

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