Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/aob/mcs004 |
Morphologies and elemental compositions of calcium crystals in phyllodes and branchlets of Acacia robeorum (Leguminosae: Mimosoideae) | |
He, Honghua1; Bleby, Timothy M.1; Veneklaas, Erik J.1; Lambers, Hans1; Kuo, John2 | |
通讯作者 | He, Honghua |
来源期刊 | ANNALS OF BOTANY
![]() |
ISSN | 0305-7364 |
EISSN | 1095-8290 |
出版年 | 2012 |
卷号 | 109期号:5页码:887-896 |
英文摘要 | Formation of calcium oxalate crystals is common in the plant kingdom, but biogenic formation of calcium sulfate crystals in plants is rare. We investigated the morphologies and elemental compositions of crystals found in phyllodes and branchlets of Acacia robeorum, a desert shrub of north-western Australia. Morphologies of crystals in phyllodes and branchlets of A. robeorum were studied using scanning electron microscopy (SEM), and elemental compositions of the crystals were identified by energy-dispersive X-ray spectroscopy. Distributional patterns of the crystals were studied using optical microscopy together with SEM. According to the elemental compositions, the crystals were classified into three groups: (1) calcium oxalate; (2) calcium sulfate, which is a possible mixture of calcium sulfate and calcium oxalate with calcium sulfate being the major component; and (3) calcium sulfate magnesium oxalate, presumably mixtures of calcium sulfate, calcium oxalate, magnesium oxalate and silica. The crystals were of various morphologies, including prisms, raphides, styloids, druses, crystal sand, spheres and clusters. Both calcium oxalate and calcium sulfate crystals were observed in almost all tissues, including mesophyll, parenchyma, sclerenchyma (fibre cells), pith, pith ray and cortex; calcium sulfate magnesium oxalate crystals were only found in mesophyll and parenchyma cells in phyllodes. The formation of most crystals was biologically induced, as confirmed by studying the crystals formed in the phyllodes from seedlings grown in a glasshouse. The crystals may have functions in removing excess calcium, magnesium and sulfur, protecting the plants against herbivory, and detoxifying aluminium and heavy metals. |
英文关键词 | Acacia robeorum biomineralization calcium oxalate calcium sulfate crystal sand druses Leguminosae magnesium oxalate Mimosoideae prisms raphides styloids |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000301971900007 |
WOS关键词 | OXALATE CRYSTALS ; PLANTS ; LEAVES ; TISSUE ; BIOSYNTHESIS ; SOLANACEAE ; PATTERNS ; DEPOSITS ; DEFENSE ; RAPHIDE |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
来源机构 | University of Western Australia |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/171210 |
作者单位 | 1.Univ Western Australia, Sch Plant Biol, 35 Stirling Highway, Crawley, WA 6009, Australia; 2.Univ Western Australia, Ctr Microscopy Characterisat & Anal, Crawley, WA 6009, Australia |
推荐引用方式 GB/T 7714 | He, Honghua,Bleby, Timothy M.,Veneklaas, Erik J.,et al. Morphologies and elemental compositions of calcium crystals in phyllodes and branchlets of Acacia robeorum (Leguminosae: Mimosoideae)[J]. University of Western Australia,2012,109(5):887-896. |
APA | He, Honghua,Bleby, Timothy M.,Veneklaas, Erik J.,Lambers, Hans,&Kuo, John.(2012).Morphologies and elemental compositions of calcium crystals in phyllodes and branchlets of Acacia robeorum (Leguminosae: Mimosoideae).ANNALS OF BOTANY,109(5),887-896. |
MLA | He, Honghua,et al."Morphologies and elemental compositions of calcium crystals in phyllodes and branchlets of Acacia robeorum (Leguminosae: Mimosoideae)".ANNALS OF BOTANY 109.5(2012):887-896. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。