Qualea grandiflora Mart. (Vochysiaceae) seed reserves and aluminum: Usage and mobilization during germination and seedling development

IF 1.1 4区 生物学 Q4 ECOLOGY Plant Species Biology Pub Date : 2024-05-28 DOI:10.1111/1442-1984.12469
Laísa Maria de Resende Castro, Christina Cleo Vinson, Andrea Lanna Almeida, Natália Faustino Cury, Michelle de Souza Fayad André, Thomas Christopher Rhys Williams, Luiz Alfredo Rodrigues Pereira
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Abstract

Qualea grandiflora Mart. is an aluminum (Al)‐accumulating Cerrado species with a metabolic dependency on Al. This study aimed to determine the presence and concentration of Al and other reserve components in Q. grandiflora seeds, as well as their respective distribution patterns, mobilization, and usage during germination and seedling growth. Thus, the concentration of Al and other minerals in seeds, seedlings, and soils was measured. Also, histochemical and energy‐dispersive X‐ray spectroscopy (EDS) analyses were performed to observe the distribution of Al, proteins, and lipids in Q. grandiflora seeds and seedlings. Additionally, the concentration of proteins and lipids was assessed as well. Hence, even in soils with low exchangeable Al3+, Q. grandiflora seeds accumulated about 6.43 g of Al/kg of dry matter (DM) together with considerable concentrations of N, P, K, Ca, and Mg. Exogenous Al had no effect on the germination properties of Q. grandiflora seeds. Furthermore, approximately 60% of the seed Al was translocated to seedling leaves. Proteins and lipids were the main organic reserves in Q. grandiflora seeds. The histochemical analysis revealed that the bulk of Al in seeds was in the cotyledons, which were also the location sites of proteins and lipids. Proteins and lipids were the primary source of energy and carbon for seedling growth. Therefore, fatty acids, proteins, and Al could play a central role during seed germination and seedling establishment, which could help to explain why this species is one of the most widespread plants in the Cerrado.
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槲寄生(Qualea grandiflora Mart.(种子储备和铝:萌芽和幼苗生长过程中的使用和调动
大花喹啉草(Qualea grandiflora Mart.)是一种铝(Al)积累型瑟拉多物种,对铝具有代谢依赖性。本研究旨在确定大叶女贞种子中铝及其他储备成分的存在和浓度,以及它们在萌芽和幼苗生长过程中各自的分布模式、动员和使用情况。因此,对种子、幼苗和土壤中的铝和其他矿物质的浓度进行了测量。此外,还进行了组织化学分析和能量色散 X 射线光谱(EDS)分析,以观察大花瞿麦种子和幼苗中铝、蛋白质和脂质的分布情况。此外,还评估了蛋白质和脂质的浓度。因此,即使在可交换性 Al3+ 较低的土壤中,大花瞿麦种子也能积累约 6.43 克 Al/千克干物质(DM)以及相当高浓度的氮、磷、钾、钙和镁。外源铝对大花瞿麦种子的萌发特性没有影响。此外,大约 60% 的种子铝被转移到了幼苗叶片上。蛋白质和脂类是大花瞿麦种子的主要有机储备。组织化学分析显示,种子中的大部分铝都在子叶中,而子叶也是蛋白质和脂类的所在地。蛋白质和脂类是幼苗生长的主要能量和碳源。因此,脂肪酸、蛋白质和铝可能在种子萌发和幼苗生长过程中起着核心作用,这也有助于解释为什么该物种是塞拉多地区分布最广的植物之一。
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来源期刊
Plant Species Biology
Plant Species Biology 生物-生态学
CiteScore
2.70
自引率
14.30%
发文量
36
审稿时长
>12 weeks
期刊介绍: Plant Species Biology is published four times a year by The Society for the Study of Species Biology. Plant Species Biology publishes research manuscripts in the fields of population biology, pollination biology, evolutionary ecology, biosystematics, co-evolution, and any other related fields in biology. In addition to full length papers, the journal also includes short research papers as notes and comments. Invited articles may be accepted or occasion at the request of the Editorial Board. Manuscripts should contain new results of empirical and/or theoretical investigations concerning facts, processes, mechanisms or concepts of evolutionary as well as biological phenomena. Papers that are purely descriptive are not suitable for this journal. Notes & comments of the following contents will not be accepted for publication: Development of DNA markers. The journal is introducing ''Life history monographs of Japanese plant species''. The journal is dedicated to minimizing the time between submission, review and publication and to providing a high quality forum for original research in Plant Species Biology.
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