A. P. Oliveira, Ailton José Crispim-Filho, V. R. L. Santos, A. C. Costa, K. L. F. Silva
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引用次数: 2
摘要
巴西农业综合企业的扩张在一定程度上是由于塞拉多生物群落可耕地面积的扩大,因此,导致除草剂的使用增加,包括草甘膦。因此,本研究的目的是评价黄包丹的生理和形态学反应。(Fabaceae),当暴露于除草剂草甘膦时,在受控的温室条件下。此外,研究还提出了确定被研究物种可能的响应模式,并为受除草剂漂移影响地区的物种研究提供补贴。实验设计为随机分组,除对照(0)外,采用25、50、100、200、400、800和1200 g i.a ha-1 7个剂量,每个重复4次。分析了气体交换、叶绿素a荧光发射、叶绿体色素含量、膜通透性以及视觉和解剖特征。结果表明,草甘膦具有植物毒性,因为即使在低剂量下,草甘膦也能影响所分析的所有参数。还证实了酚类化合物的存在,主要是在栅栏薄壁中。这些代谢变化表明了维吉利菊对草甘膦的敏感性。因此,观察到的反应可以作为诊断草甘膦暴露对该物种的影响的工具,存在于受该除草剂漂移影响的原生地区。它的滥用对塞拉多的生物多样性构成了威胁。
PHYSIOLOGICAL AND MORPHOANATOMIC RESPONSES OF Bowdichia virgilioides KUNTH. (FABACEAE) TO GLYPHOSATE
ABSTRACT The expansion of agribusiness in Brazil is partly due to the expansion of arable areas in the Cerrado biome, which, consequently, leads to an increase in the use of herbicides, including glyphosate. Therefore, the objective of this study was to evaluate the physiological and morphoanatomic responses of Bowdichia virgilioides Kunth. (Fabaceae), when exposed to the herbicide glyphosate, under controlled greenhouse conditions. In addition, the study proposed to identify possible response patterns of the studied species and provide subsidies for the study of the species in areas affected by the drift of the herbicide. The experimental design was in randomized blocks, with seven doses of the herbicide: 25, 50, 100, 200, 400, 800, and 1200 g i.a ha-1 besides the control (0), with four repetitions each. Gas exchange, chlorophyll a fluorescence emission, chloroplast pigment content, membrane permeability, and visual and anatomical features were analyzed. The results showed that glyphosate is phytotoxic to B. virgilioides because, even at low doses, this herbicide was able to affect all parameters analyzed. There was also confirmation of the presence of phenolic compounds, mainly in the palisade parenchyma. The metabolic alterations presented demonstrated the sensitivity of B. virgilioides to glyphosate. Thus, the observed responses can serve as a tool for diagnosing the effects of glyphosate exposure on this species, present in native areas affected by the drift of this herbicide. Its indiscriminate use poses a risk to Cerrado biodiversity.
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