Alex Assiry

Annals of Botany News in Brief

Hypernodulating soybean mutant line nod4 lacking ‘Autoregulation of Nodulation’ has limited root-to-shoot water transport capacity

Although hypernodulating phenotype mutants of legumes, such as soybean, possess a high leaf N content, the large number of root nodules decreases carbohydrate availability for plant growth and seed yield. In addition, under conditions of high air vapour pressure deficit (VPD), hypernodulating plants show a limited capacity to replace water losses through transpiration, resulting in […]

Annals of Botany News in Brief

Does evidence of saltwater exposure explain recent changes in the tree communities of North Carolina’s Coastal Plain?

Coastal plant communities globally are highly vulnerable to future sea-level rise and storm damage, but the extent to which these habitats are affected by the various environmental perturbations associated with chronic salinization remains unclear. In this study, Ury et al. examine the relationship between North Carolina wetland tree community composition and basal area change and […]

Annals of Botany News in Brief

Modelling tiller growth and mortality as a sink-driven process using Ecomeristem

Plant modelling can efficiently support ideotype conception, particularly in multi-criteria selection contexts. This is the case for biomass sorghum, implying the need to consider traits related to biomass production and quality. This study, by Larue and colleagues, evaluated three modelling approaches for their ability to predict tiller growth, mortality and their impact, together with other […]

Annals of Botany News in Brief

Leaf heteroblasty in Passiflora edulis as revealed by metabolic profiling and expression analyses of microRNAs

Juvenile-to-adult phase transition is marked by changes in leaf morphology, mostly due to the temporal development of the shoot apical meristem, a phenomenon known as heteroblasty. Sugars and microRNA-controlled modules are components of the heteroblastic process in Arabidopsis thaliana leaves. However, our understanding about their roles during phase-changing in other species, such as Passiflora edulis, […]

Annals of Botany

Potential involvement of root auxins in drought tolerance by modulating nocturnal and daytime water use in wheat

The ability of wheat genotypes to save water by reducing their transpiration rate (TR) at times of the day with high vapour pressure deficit (VPD) has been linked to increasing yields in terminal drought environments. Further, recent evidence shows that reducing nocturnal transpiration (TRN) could amplify water saving. Previous research indicates that such traits involve […]

Annals of Botany News in Brief

FSPM-based investigation of plant interactions in complex wheat canopies

Functional–structural plant models (FSPMs) explicitly describe individual plant architecture, making this approach suitable for unravelling plant–plant interactions in complex canopies. Barillot et al. developed a comprehensive FSPM accounting for the interactions between plant architecture, light, soil nitrogen and the metabolism of carbon and nitrogen. The model is evaluated by simulating the functioning of post-anthesis wheat […]

Annals of Botany News in Brief

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 […]

Annals of Botany News in Brief

Heteroblasty adjusts plants to changing environments post fire

Heteroblastic species show an abrupt change in morphology at a fixed ontogenetic stage, and are relatively frequent in Mediterranean type ecosystems with regular fires. Using the Restionaceae from the southern African Cape flora, Ehmig et al. investigate the potential functional significance of heteroblasty, in particular in post-fire environments. Fires result in enhanced nutrient and moisture […]

Annals of Botany News in Brief

Nitrate nutrition improves energy efficiency under hypoxic stress

Plants take up and assimilate nitrogen (N) in the form of nitrate (NO3–) or ammonium (NH4+), or a combination of both. When oxygen availability is reduced (hypoxia), plants need to generate energy to survive and protect themselves against the hypoxia-induced damage. Wany et al. investigate the role of NO3– or NH4+ on increasing energy efficiency under hypoxia in Arabidopsis. […]

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