植物对铝的耐受性：发芽与植物生长

Tolerance of to Aluminum: Germination and Plant Growth.

作者信息

Almeida Rodrigues Arthur, Carvalho Vasconcelos Filho Sebastião, Müller Caroline, Almeida Rodrigues Douglas, de Fátima Sales Juliana, Zuchi Jacson, Carlos Costa Alan, Lino Rodrigues Cássia, Alves da Silva Adinan, Pereira Barbosa Danilo

机构信息

Laboratory of Plant Anatomy, Goiano Federal Institute of Education, Science and Technology (IFGoiano), Campus Rio Verde, PO Box 66, Rio Verde, Goiás 75901-970, Brazil.

Laboratory of Ecophysiology and Plant Productivity, Goiano Federal Institute of Education, Science and Technology (IFGoiano), Campus Rio Verde, PO Box 66, Rio Verde, Goiás 75901-970, Brazil.

出版信息

Plants (Basel). 2019 Aug 31;8(9):317. doi: 10.3390/plants8090317.

DOI:10.3390/plants8090317

PMID:31480407

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6783871/

Abstract

Native Cerrado plants are exposed to soils with low pH and high availability of Al. In this study, we measured the Al content in adult plants, and investigated the effects of various Al doses on germination and early development of plants. For germination tests, the seeds were soaked in Al solution and evaluated for twenty days in growth chambers. In a second experiment, young plants were cultivated in hydroponic systems with various Al concentrations to evaluate the morphological, anatomical and physiological characteristics of . Anatomical changes and low germinative vigor were observed in seeds germinated in 600 and 800 μmol Al L. In the hydroponic system, 200 μmol Al L stimulated root growth in young plants. The activity of antioxidant enzymes and the accumulation of phenolic compounds were greatest at the highest Al doses, preventing changes in gas exchange and chlorophyll fluorescence. Starch grain accumulation was noted in plant cells exposed to 200 and 400 μmol Al L. Adult trees also accumulated Al in leaves, bark and seeds. These data suggest that is tolerant to Al.

摘要

塞拉多原生植物生长在低pH值且铝含量高的土壤中。在本研究中，我们测量了成年植物中的铝含量，并研究了不同铝剂量对植物发芽和早期发育的影响。在发芽试验中，将种子浸泡在铝溶液中，并在生长室中评估20天。在第二个实验中，将幼苗种植在含有不同铝浓度的水培系统中，以评估其形态、解剖和生理特征。在600和800μmol Al L条件下萌发的种子中观察到解剖结构变化和低发芽活力。在水培系统中，200μmol Al L促进了幼苗根系生长。在最高铝剂量下，抗氧化酶活性和酚类化合物积累量最大，从而防止了气体交换和叶绿素荧光的变化。在暴露于200和400μmol Al L的植物细胞中发现了淀粉粒积累。成年树木的叶子、树皮和种子中也积累了铝。这些数据表明[植物名称]对铝具有耐受性。