Optimizing Paclobutrazol Application for Regulating Dwarfing in Ougan (Citrus reticulata cv. Suavissima): Comprehensive Insights from Growth, Photosynthesis, and Physiological Responses

Plants, Journal Year: 2025, Volume and Issue: 14(5), P. 763 - 763

Published: March 2, 2025

Rapid urbanization and increasing land scarcity have made urban agriculture efficient space utilization critical directions in modern agriculture. Ougan, a fruit tree valued for both its economic ecological benefits, holds significant promise dwarfing cultivation techniques. In this study, root-irrigation method was used to apply paclobutrazol at various concentrations (200, 500, 1000, 1500, 2000 mg/L) Ougan seedlings, with control group comparison. Growth parameters include an average daily increase of plant height, stem girth, new branches, branch as well physiological indices such leaf SPAD values, nitrogen content, net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration were measured during spring summer growth periods. The results demonstrate that PBZ exerts distinct concentration-dependent regulatory effect on growth: higher significantly inhibited height while promoting increases diameter, several exhibiting unimodal response. Short-term (spring) application enhanced certain parameters, rate conductance; however, prolonged exposure (summer) resulted decline efficiency overall status. Through comprehensive evaluation using principal component analysis PLS-SEM, the 500 mg/L treatment identified achieving optimal balance between inhibition maintenance nutritional status, closely approximating ideal effect. This study elucidates complex effects growth, photosynthesis, carbon assimilation through natural climate, providing robust technical theoretical support future dwarf practices. These findings facilitate development trees into bonsai vegetation, demonstrating horticultural potential.

Language: Английский

Identification of novel candidate genes for regulating oil composition in soybean seeds under environmental stresses

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: April 17, 2025

A key objective of soybean breeding programs is to enhance nutritional quality for human and animal consumption, with improved fatty acid (FA) composition health benefits, expand use industrial applications. We conducted a metabolite genome-wide association study (mGWAS) identify genomic regions associated changes in FA ratios seeds influenced by environmental factors. This mGWAS utilized 218 plant introductions (PIs) grown two field locations Virginia over years. The revealed that 20 SNPs were significantly 21 ratios, while additional suggestive found 36 highlighting potential quantitative trait loci linked composition. Many these are located near or within the genes related phytohormone-mediated biotic abiotic stress responses, suggesting involvement factors modulating seeds. Our findings provide novel insights into genetic influencing oilseeds. research also lays foundation developing stable markers develop cultivars tailored profiles different practical applications under variable growth conditions.

Language: Английский