Nutrient and drought stress: implications for phenology and biomass quality in miscanthus.
Nutrient and drought stress: implications for phenology and biomass quality in miscanthus.
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DOI：
10.1093/aob/mcy155
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发表时间：
2019-10-29
期刊：
影响因子：
4.2
通讯作者：
Bosch M
中科院分区：
文献类型：
--
作者：
da Costa RMF;Simister R;Roberts LA;Timms-Taravella E;Cambler AB;Corke FMK;Han J;Ward RJ;Buckeridge MS;Gomez LD;Bosch M
在贫瘠的土地上种植包括芒草在内的专用生物质作物，为减少对化石燃料的依赖提供了一个有希望的办法。然而，人们对低等级农田经常经历的环境压力对芒草生物质作物细胞壁质量性状的影响知之甚少。在这项研究中，三种不同的芒草基因型暴露于干旱胁迫和营养胁迫，单独和组合，其目的是评估其对植物生长和细胞壁特性的影响。在国家植物表型组学中心（NPPC-Aberystwyth）的自动成像设备用于动态表型分析，以确定植物对单独和组合胁迫的响应。收获的叶和茎样品的三个芒草基因型（芒，芒sacchariflorus和芒×芒）分别进行糖化试验，以测量糖释放，和细胞壁组成分析。表型分析表明，M. sacchariflorus基因型Sac-5，特别是M.中华绒螯蟹基因型Sin-11比M.在营养不良的堆肥条件下，×高粱基因型Gig-311表现出干旱胁迫。糖释放酶水解，作为生物质质量的措施，是显着影响不同的环境条件下的压力，基因型和器官依赖的方式。丰富的水和低养分的组合导致最高的糖从叶子中释放，而茎，这通常与干旱和营养丰富的条件相结合。细胞壁组成分析表明，细胞壁多糖，包括杂木聚糖和果胶，可能与木质素的精细结构的变化，有助于观察到的差异，细胞壁生物质糖释放。结果突出的重要性，除了生物量产量测定和选择合适的芒草基因型不同的环境条件下的要求，芒草生物量质量的措施进行评估。
The cultivation of dedicated biomass crops, including miscanthus, on marginal land provides a promising approach to the reduction of dependency on fossil fuels. However, little is known about the impact of environmental stresses often experienced on lower-grade agricultural land on cell-wall quality traits in miscanthus biomass crops. In this study, three different miscanthus genotypes were exposed to drought stress and nutrient stress, both separately and in combination, with the aim of evaluating their impact on plant growth and cell-wall properties. Automated imaging facilities at the National Plant Phenomics Centre (NPPC-Aberystwyth) were used for dynamic phenotyping to identify plant responses to separate and combinatorial stresses. Harvested leaf and stem samples of the three miscanthus genotypes (Miscanthus sinensis, Miscanthus sacchariflorus and Miscanthus × giganteus) were separately subjected to saccharification assays, to measure sugar release, and cell-wall composition analyses. Phenotyping showed that the M. sacchariflorus genotype Sac-5 and particularly the M. sinensis genotype Sin-11 coped better than the M. × giganteus genotype Gig-311 with drought stress when grown in nutrient-poor compost. Sugar release by enzymatic hydrolysis, used as a biomass quality measure, was significantly affected by the different environmental conditions in a stress-, genotype- and organ-dependent manner. A combination of abundant water and low nutrients resulted in the highest sugar release from leaves, while for stems this was generally associated with the combination of drought and nutrient-rich conditions. Cell-wall composition analyses suggest that changes in fine structure of cell-wall polysaccharides, including heteroxylans and pectins, possibly in association with lignin, contribute to the observed differences in cell-wall biomass sugar release. The results highlight the importance of the assessment of miscanthus biomass quality measures in addition to biomass yield determinations and the requirement for selecting suitable miscanthus genotypes for different environmental conditions.
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影响因子：
4.2
作者：
da Costa RM;Lee SJ;Allison GG;Hazen SP;Winters A;Bosch M
通讯作者：
Bosch M
影响因子：
6.3
作者：
Crowe JD;Feringa N;Pattathil S;Merritt B;Foster C;Dines D;Ong RG;Hodge DB
通讯作者：
Hodge DB
影响因子：
5.6
作者：
Chen CL;van der Schoot H;Dehghan S;Alvim Kamei CL;Schwarz KU;Meyer H;Visser RG;van der Linden CG
通讯作者：
van der Linden CG
影响因子：
6.9
作者：
Bosch M;Mayer CD;Cookson A;Donnison IS
通讯作者：
Donnison IS
影响因子：
32.5
作者：
DeMartini, Jaclyn D.;Pattathil, Sivakumar;Wyman, Charles E.
通讯作者：
Wyman, Charles E.