PSV-26 Phenotypic plasticity of Gliricidia sepium under different planting densities.

IF 2.9 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Eduardo Machado, Marcelo Rodrigues, Eduardo Pereira Jr, Flavio Kaneko, Vanessa Galati, Gervasio Pegoraro, José C B Dubeux Jr, Evandro Muniz, Flavia van Cleef, Eric H C B van Cleef
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引用次数: 0

Abstract

Gliricidia sepium (Jacq.) Kunth ex Walp (G. sepium) is a versatile leguminous tree with significant potential for enhancing ecosystem services and supporting sustainable agriculture. Its ability to adapt to varying planting densities is crucial for maximizing biomass yield and forage quality. This study investigated the anatomical, productive, and bromatological responses of G. sepium to different planting densities, testing the hypothesis that increased density induces anatomical adaptations that enhance biomass production. A randomized block experiment evaluated three planting densities (10,000, 20,000, and 30,000 plants ha⁻¹), analyzing micromorphometric traits, biomass yield, bromatological composition, and key correlations among these variables. Leaf micromorphometric analysis revealed density-dependent changes in the abaxial epidermal surface, upper and lower collenchyma, lacunar parenchyma, and stomatal number and density. In stems, significant variations were observed in the medullary radius, cortex, and periderm, while roots exhibited structural modifications in the periderm and phloem. Higher planting densities positively influenced vegetative growth, with total edible plant length increasing linearly (P = 0.002), with no change in total forage production (P > 0.10). Among bromatological traits, hemicellulose content showed a decreasing trend as planting density increased (P = 0.09). Strong correlations between micromorphometric, biometric, productive, and bromatological variables suggested an integrated structural and functional adaptation to planting density. A density of 30,000 plants ha⁻¹ was optimal, balancing anatomical development, productivity, and quality. These findings confirm the phenotypic plasticity of G. sepium, demonstrating its ability to structurally and functionally adapt under intensive planting conditions. Such adaptations enhance its potential for high-yield forage production, supporting its domestication and sustainable use for ruminant feeding systems.
不同种植密度下水仙花PSV-26的表型可塑性
黄貂鱼(雅科)蚕豆(Kunth ex Walp, G. sepium)是一种多功能豆科乔木,在增强生态系统服务和支持可持续农业方面具有重要潜力。其适应不同种植密度的能力对于最大限度地提高生物量产量和饲料质量至关重要。本研究考察了不同种植密度下血根的解剖学、生产力和色素学响应,验证了密度增加诱导解剖学适应从而提高生物量产量的假设。一项随机分组实验评估了三种种植密度(10,000株、20,000株和30,000株),分析了微观形态特征、生物量产量、色相组成以及这些变量之间的关键相关性。叶片显微形态分析显示,叶片背面表皮、上下厚壁组织、腔隙薄壁组织、气孔数量和密度的变化具有密度依赖性。在茎中,髓质半径、皮层和周皮发生了显著变化,而根的周皮和韧皮部发生了结构变化。较高的种植密度正影响营养生长,可食用植物总长度线性增加(P = 0.002),而饲料总产量无变化(P > 0.10)。半纤维素含量随种植密度的增加呈下降趋势(P = 0.09)。显微形态、生物特征、产量和色差变量之间存在强相关性,表明植物对种植密度具有整体的结构和功能适应性。3万株的密度是最理想的,可以平衡解剖发育、生产力和质量。这些发现证实了蛇皮草的表型可塑性,表明其在结构和功能上适应集约种植条件的能力。这种适应性增强了其高产饲料生产的潜力,支持其驯化和反刍动物饲养系统的可持续利用。
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来源期刊
Journal of animal science
Journal of animal science 农林科学-奶制品与动物科学
CiteScore
4.80
自引率
12.10%
发文量
1589
审稿时长
3 months
期刊介绍: The Journal of Animal Science (JAS) is the premier journal for animal science and serves as the leading source of new knowledge and perspective in this area. JAS publishes more than 500 fully reviewed research articles, invited reviews, technical notes, and letters to the editor each year. Articles published in JAS encompass a broad range of research topics in animal production and fundamental aspects of genetics, nutrition, physiology, and preparation and utilization of animal products. Articles typically report research with beef cattle, companion animals, goats, horses, pigs, and sheep; however, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will be considered for publication.
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