Impact of rice cultivar and organ on elemental composition of phytoliths and the release of bio-available silicon.
Impact of rice cultivar and organ on elemental composition of phytoliths and the release of bio-available silicon.
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水稻品种和器官对植硅体元素组成和生物可利用硅释放的影响
DOI：
10.3389/fpls.2014.00529
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发表时间：
2014
影响因子：
5.6
通讯作者：
Cornelis JT
中科院分区：
文献类型：
--
作者：
Li Z;Song Z;Cornelis JT
硅的大陆生物循环在全球硅循环中起着关键作用，并通过海洋生物和陆地生物群的营养、植硅体包裹的有机碳(PhytOC)的积累和硅酸盐矿物的风化来部分控制全球碳(C)收支。尽管植硅体的元素组成对其在土壤中的溶解性起着关键作用，但植物品种和器官对水稻等高硅积累植物中植硅体元素组成的影响尚不完全清楚。研究结果表明，水稻品种显著影响水稻地上部不同器官(籽粒、叶鞘、叶和茎)中植硅体的元素组成(硅、铝、铁和碳)。植物体内被遮挡的有机碳含量受植物中硅、铝、铁含量的影响，而与植物体内的元素组成无关。对于不同的品种，我们的数据文件显示，与籽粒和茎相比，叶和鞘的植硅体释放出更高的生物有效硅，其特征是Al和Fe的富集度更高(即较低的Si/Al和Si/Fe比)。我们认为，植硅体在土壤中的溶解度可能受水稻品种和器官类型的控制。我们的结果表明，形态、水化速率和化学组成对植硅体的溶解度和硅在土壤溶液中的动力学释放的作用有待进一步研究。这对于更好地理解不同植物器官和品种的土壤改良对土壤有机碳储量和溶解硅输送的影响是至关重要的，因为我们表明，与籽粒和茎相比，水稻鞘和叶器官的特征是植硅体中的有机碳含量较高，植硅体的溶解度也较高。我们的研究表明了研究农业管理对高硅蓄积植物土壤中硅和碳汇和碳源演变的影响的重要性。
The continental bio-cycling of silicon (Si) plays a key role in global Si cycle and as such partly controls global carbon (C) budget through nutrition of marine and terrestrial biota, accumulation of phytolith-occluded organic carbon (PhytOC) and weathering of silicate minerals. Despite the key role of elemental composition of phytoliths on their solubility in soils, the impact of plant cultivar and organ on the elemental composition of phytoliths in Si high-accumulator plants, such as rice (Oryza sativa) is not yet fully understood. Here we show that rice cultivar significantly impacts the elemental composition of phytoliths (Si, Al, Fe, and C) in different organs of the shoot system (grains, sheath, leaf and stem). The amount of occluded OC within phytoliths is affected by contents of Si, Al, and Fe in plants, while independent of the element composition of phytoliths. Our data document, for different cultivars, higher bio-available Si release from phytoliths of leaves and sheaths, which are characterized by higher enrichment with Al and Fe (i.e., lower Si/Al and Si/Fe ratios), compared to grains and stems. We indicate that phytolith solubility in soils may be controlled by rice cultivar and type of organs. Our results highlight that the role of the morphology, the hydration rate and the chemical composition in the solubility of phytoliths and the kinetic release of Si in soil solution needs to be studied further. This is central to a better understanding of the impact of soil amendment with different plant organs and cultivars on soil OC stock and on the delivery of dissolved Si as we show that sheath and leaf rice organs are both characterized by higher content of OC occluded in phytolith and higher phytolith solubility compared to grains and stems. Our study shows the importance of studying the impact of the agro-management on the evolution of sinks and sources of Si and C in soils used for Si-high accumulator plants.
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DOI：
10.2136/sssaj1980.03615995004400040043x
发表时间：
1980-01-01
影响因子：
2.9
作者：
BARTOLI, F;WILDING, LP
通讯作者：
WILDING, LP
影响因子：
4.9
作者：
Houben, David;Sonnet, Philippe;Cornelis, Jean-Thomas
通讯作者：
Cornelis, Jean-Thomas
影响因子：
3.4
作者：
Li, Darcy Dan;Lerman, Abraham;Mackenzie, Fred T.
通讯作者：
Mackenzie, Fred T.
影响因子：
5.2
作者：
Blecker, S. W.;McCulley, R. L.;Kelly, E. F.
通讯作者：
Kelly, E. F.
影响因子：
4.9
作者：
Li, Zimin;Song, Zhaoliang;Wang, Hailong
通讯作者：
Wang, Hailong