鉴于全球集成系统中森林组成部分的利用日益增加,加上面临水限制的地区对食物的需求不断增长,本研究旨在评估生理和生化参数如何有助于适应机制在本地物种和桉树基因型与大豆或玉米间作之间的多样化。本地树种Anadenantheramacrocarpa和Dipteryxalata,桉树基因型UrograndisI-144和UrocamVM01在大豆和玉米间作地区种植,并在秋季进行评估,冬天,spring,和夏天。这项研究评估了早晨的水势,叶绿体色素浓度,气体交换,细胞损伤,和抗氧化酶活性。间作大豆,A.macrocarpa的开发通过瞬时水分利用效率得到改善,电子传输链的能量使用,叶绿体色素,和过氧化氢酶活性。另一方面,A.macrocarpa当,用玉米间作,尽管增加了反应中心的能量吸收,需要非光化学耗散和酶的活性超氧化物歧化酶和抗坏血酸过氧化物酶响应水和氧化缺陷。在D.Alata,生理生化反应不受间作的影响,而是受季节的影响,秋季叶绿体色素增加,夏季电子传递增加。然而,在玉米间作中,多余能量的耗散允许叶片适应。I-144和VM01基因型在作物间之间也没有显着差异。结果描述了与玉米间作的本地物种A.macrocarpa的光合作用和生化挑战,例如更需要酶和非酶防御机制来响应更多的负水势。在D.Alata,由于保护光合装置的机制得到了改善,这两种作物都面临着挑战。在长期干旱条件下,I-144基因型的存活在两种作物中可能效率低下。因为它修改了光系统;相比之下,基因型VM01最适合使用捕获能量的系统,减少水分流失和有弹性。
Given the increasing utilization of forest components in integration systems worldwide, coupled with the growing demand for food in regions facing water restrictions, this study aims to evaluate how physiological and biochemical parameters contribute to the diversification of adaptive mechanisms among native species and eucalyptus genotypes intercropped with soybean or corn. The native tree species Anadenanthera macrocarpa and Dipteryx alata, and the eucalyptus genotypes Urograndis I-144 and Urocam VM01, were grown in soybean and corn intercropping areas and evaluated in fall, winter, spring, and summer. The study evaluated morning water potential, chloroplast pigment concentration, gas exchange, cell damage, and antioxidant enzyme activity. Intercropped with soybean, development the of A. macrocarpa improved through instantaneous water use efficiency, energy use by the electron transport chain, chloroplast pigments, and catalase enzyme activity. On the other hand, A. macrocarpa when, intercropped with corn, despite increasing energy absorption by the reaction center, there is a need for non-photochemical dissipation and in the activity of the enzymes superoxide dismutase and ascorbate peroxidase in response to water and oxidative deficits. In D. alata, the physiological and biochemical responses were not influenced by intercropping but by seasons, with increased chloroplast pigments in fall and electron transport in summer. However, in corn intercropping, the dissipation of excess energy allowed leaf acclimatization. The I-144 and VM01 genotypes also showed no significant differences between intercrops. The results describe photosynthetic and biochemical challenges in the native species A. macrocarpa intercropped with corn, such as a greater need for enzymatic and non-enzymatic defense mechanisms in response to more negative water potential. In D. alata, the challenges are present in both intercrops due to improved mechanisms to protect the photosynthetic apparatus. The survival of the I-144 genotype may be inefficient in both intercrops under prolonged drought conditions, as it modifies the photosystem; in contrast, genotype VM01 was the most adapted to the system for using captured energy, reducing water loss and being resilient.