Crop and Pasture Biochemistry and Physiology

Plants harvest light energy, absorb water and mineral nutrients, and convert these into the building blocks of growth and development. At the cellular level, photochemical reactions in chloroplasts split water and generate ATP and reducing power, which drive carbon fixation via the Calvin–Benson cycle to assemble sugars. Concomitant biochemical pathways assimilate nitrogen and other essential elements into amino acids and co-factors. Cells regulate osmosis and turgor through accumulation of compatible solutes, while the root system explores soil water and nutrients. At the organ and whole-plant scale, dynamic changes in leaf angle, stomatal conductance and pigment distribution optimise resource capture and avoid photodamage. Under water deficit, crops restrict leaf area expansion, adjust stomatal opening and deploy osmotic adjustment and antioxidant defences to sustain growth. Molecular networks of photoreceptors, transporters, transcription factors and enzymes integrate environmental signals with developmental programmes, ensuring that roots, leaves, stems and reproductive organs coordinate their demands. The interplay of light harvesting, carbon assimilation, nutrient remobilisation, water use efficiency and photoprotective movements underpins yield potential in both arable crops and pasture species.

Research from Nature Portfolio

Recent studies have demonstrated that phosphorylation of key adaptor proteins modulates the sensitivity of plant tissues to directional light, linking photoreceptor activation to polar redistribution of a growth hormone and enabling fine-tuned organ bending and subcellular pigment movements. Complementary work has shown that the three-dimensional shape of leaf cells in sun-exposed varieties constrains chloroplast mobility under intense light, yet elevates pigment density to maintain high photosynthetic rates, revealing a trade-off between cellular morphology and dynamic light acclimation. Investigations of cereal physiology under imposed water-deficit and recovery cycles have quantified how tolerant lines preserve leaf water status and membrane integrity through osmotic adjustment and antioxidant enzyme induction, and how rapid restoration of photosynthetic capacity upon re-watering contributes to yield stability in drought-prone environments.

Crop and Pasture Biochemistry and Physiology publication trend

The graph below shows the total number of articles in crop and pasture biochemistry and physiology across all publications each year (not limited to Nature Index journals).

Technical terms

Phototropism: directional growth of plant organs towards or away from light stimuli, mediated by specialised photoreceptors and hormone redistribution.

Chloroplast photorelocation: movement of chloroplasts within cells to optimise light capture under low irradiance and minimise photodamage under high irradiance.

Osmotic adjustment: active accumulation of solutes in cells to lower osmotic potential, maintain turgor and sustain water uptake under drought.

Radiation use efficiency (RUE): biomass produced per unit of photosynthetically active radiation intercepted by the canopy.

Transpiration efficiency (TE): biomass produced per unit of water transpired through the plant.

Genome-wide association study (GWAS): systematic analysis correlating genetic variants across the genome with phenotypic traits in diverse populations.

Weighted gene co-expression network analysis (WGCNA): computational method to group genes by shared expression patterns and identify central “hub” regulators in stress responses.

Quantitative trait locus (QTL): genomic region statistically associated with variation in a quantitative trait such as drought tolerance or nutrient use efficiency.

References

1. Regulation of plant phototropic growth by NPH3/RPT2-like substrate phosphorylation and 14-3-3 binding. Nature Communications (2021).
2. Palisade cell shape affects the light-induced chloroplast movements and leaf photosynthesis. Scientific Reports (2018).
3. Physiological and biochemical changes during drought and recovery periods at tillering and jointing stages in wheat (Triticum aestivum L.). Scientific Reports (2018).
4. Genome Wide Association Study Uncovers the QTLome for Osmotic Adjustment and Related Drought Adaptive Traits in Durum Wheat. Genes (2022).
5. Comparative physiological and coexpression network analyses reveal the potential drought tolerance mechanism of peanut. BMC Plant Biology (2022).