The study created a system that blocks root‑mediated signaling between wheat varieties in a varietal mixture and used transcriptomic and metabolomic profiling to reveal that root chemical interactions drive reduced susceptibility to Septoria tritici blotch, with phenolic compounds emerging as key mediators. Disruption of these root signals eliminates both the disease resistance phenotype and the associated molecular reprogramming.
A comprehensive multi‑environment trial of 437 maize testcross hybrids derived from 38 MLN‑tolerant lines and 29 testers identified additive genetic effects as the primary driver of grain yield, disease resistance, and drought tolerance. Strong general combining ability and specific combining ability patterns were uncovered, with top hybrids delivering up to 5.75 t ha⁻¹ under MLN pressure while maintaining high performance under optimum and drought conditions. The study provides a framework for selecting elite parents and exploiting both additive and non‑additive effects to develop resilient maize hybrids for sub‑Saharan Africa.
The authors compiled and standardized published data on Rubisco dark inhibition for 157 flowering plant species, categorizing them into four inhibition levels and analyzing phylogenetic trends. Their meta‑analysis reveals a complex, uneven distribution of inhibition across taxa, suggesting underlying chloroplast microenvironment drivers and providing a new resource for future photosynthesis improvement efforts.
The study identified two wheat genes tightly linked to the triple pistil (TP) phenotype and created functional co‑dominant markers for early selection. CRISPR‑Cas9 editing of one gene converted TP florets to single‑grain florets, while field evaluation showed TP wheat increases grains per spike without reducing grain weight, highlighting its breeding value.
Growth and Yield Response of Soft White Common Spring Wheat (SWCSW) Varieties under Different Nitrogen Fertilizations and Plant Growth Regulators Applications
The study evaluated the effects of plant growth regulators (PGRs) applied at tillering, stem elongation, and flag leaf emergence on two Soft White Common Spring Wheat varieties (Louise and Diva) under low and high nitrogen levels using a split‑plot field design over two seasons. PGR treatments generally increased stem diameter and reduced height, improving stem strength and reducing lodging, while grain yield responses were variable but positive for certain PGR combinations. The results suggest that 168 kg N ha⁻¹ provides adequate productivity, though long‑term studies are recommended.
The study presents an optimized Agrobacterium-mediated transformation protocol for bread wheat that incorporates a GRF4‑GIF1 fusion to enhance regeneration and achieve genotype‑independent transformation across multiple cultivars. The approach consistently improves transformation efficiency while limiting pleiotropic effects, offering a versatile platform for functional genomics and gene editing in wheat.
Tomato leaf transcriptomic changes promoted by long-term water scarcity stress can be largely prevented by a fungal-based biostimulant
Authors: Lopez-Serrano, L., Ferez-Gomez, A., Romero-Aranda, R., Jaime Fernandez, E., Leal Lopez, J., Fernandez Baroja, E., Almagro, G., Dolezal, K., Novak, O., Diaz, L., Bautista, R., Leon Morcillo, R. J., Pozueta Romero, J.
Foliar application of Trichoderma harzianum cell‑free culture filtrates (CF) increased fruit yield, root growth, and photosynthesis in a commercial tomato cultivar under prolonged water deficit in a Mediterranean greenhouse. Integrated physiological, metabolite, and transcriptomic analyses revealed that CF mitigated drought‑induced changes, suppressing about half of water‑stress responsive genes, thereby reducing the plant’s transcriptional sensitivity to water scarcity.
The study measured how plant mass relates to growth rate across 195 European winter wheat cultivars under greenhouse conditions, revealing genetic variation in allometric scaling linked to leaf allocation and development speed. A genetic association with the Photoperiod response-1 (Ppd-1) gene connected greenhouse allometry to genotype‑by‑environment interactions affecting grain yield in field trials, highlighting the agronomic relevance of growth allometry.
The study examined over six decades of USDA Hard Red Spring Wheat Uniform Regional Nursery data to quantify genetic gains in key agronomic traits. It found a modest positive genetic gain of 0.61% per year for grain yield, with stable grain protein levels despite a negative yield‑protein correlation, and highlighted varying gains among breeding programs, especially a ~1% per annum increase in Minnesota's public program.
Transcriptome responses of two Halophila stipulacea seagrass populations from pristine and impacted habitats, to single and combined thermal and excess nutrient stressors, reveal local adaptive features and core stress-response genes
Authors: Nguyen, H. M., Yaakov, B., Beca-Carretero, P., Procaccini, G., Wang, G., Dassanayake, M., Winters, G., Barak, S.
The study examined transcriptomic responses of the tropical seagrass Halophila stipulacea from a pristine and an impacted site under single and combined thermal and excess nutrient stress in mesocosms. Combined stress caused greater gene reprogramming than individual stresses, with thermal effects dominating and the impacted population showing reduced plasticity but higher resilience. Core stress‑response genes were identified as potential early field indicators of environmental stress.