Modification of Cell Wall Architecture in Gramineous Plants under Altered Gravity Conditions
Modification of Cell Wall Architecture in Gramineous Plants under Altered Gravity Conditions
复制标题
改变重力条件下禾本科植物细胞壁结构的改变
DOI：
10.2187/bss.23.137
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
T. Hoson
中科院分区：
文献类型：
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作者：
K. Wakabayashi;K. Soga;T. Hoson
禾本科植物，如水稻、小麦和玉米，是重要的农作物。禾本科植物的细胞壁组成与双子叶植物如拟南芥、豌豆和绿豆的细胞壁组成不同。在禾本科植物的细胞壁中，阿拉伯聚糖和β-葡聚糖是主要的基质多糖，它们在细胞壁结构中形成网络结构。重力刺激影响禾本科植物枝条中β-葡聚糖的代谢;当超重力抑制枝条伸长时，抑制β-葡聚糖的分解。而在空间微重力条件下则得到了相反的结果。另一方面，阿拉伯木聚糖和二阿魏酸（DFA）的含量增加，在连续超重力条件下。由于阿拉伯聚糖通过DFA桥交联，持续的超重力可能会刺激细胞壁内阿拉伯聚糖-DFA网络的形成。这些发现表明，β-葡聚糖代谢主要参与生长调节机制，而阿拉伯聚糖-DFA网络具有抵抗重力的承重功能。这些壁成分的修饰可能有助于禾本科植物在改变的重力条件下维持其结构和生长的能力。
Gramineous plants, such as rice, wheat, and maize, are essential crops. The cell wall composition of gramineous plants is distinguished from that of dicotyledons, such as Arabidopsis, pea, and mung bean. In cell walls of gramineous plants, arabinoxylans and β-glucans are the major matrix polysaccharides and they make network structure within cell wall architecture. Gravitational stimuli affect the metabolism of β-glucans in gramineous shoots; hypergravity suppressed the β-glucan breakdown, when it inhibited shoot elongation. The opposite results were obtained under microgravity conditions in space. On the other hand, the arabinoxylan and diferulic acid (DFA) contents increased under continuous hypergravity conditions. Since arabinoxylans are cross-linked by DFA-bridges, continuous hypergravity may stimulate the formation of arabinoxylan-DFA network within cell walls. These findings suggest that the β-glucan metabolism is primarily involved in the mechanism of growth regulation, while the arabinoxylan-DFA network has a load-bearing function against the gravitational force. The modification of these wall constituents may contribute to the capacity of gramineous plants to sustain their structure and growth under altered gravity conditions.
超重力条件下生长的小豆上皮细胞中细胞壁结合的过氧化物酶活性和木质素形成。
DOI：
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发表时间：
2009
期刊：
J. Plant Physiol. Online 版
影响因子：
--
作者：
Ooume K;Inoue Y;Soga K;Wakabayashi K;Fujii S;Yamamoto R;Hoson T;Ooume K.;Wakabayashi K.
通讯作者：
Wakabayashi K.
具有 4-(1,3-苯并咪唑-2-基)-3-羟基苯基的二氧杂环丁烷的发光
DOI：
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发表时间：
2007
期刊：
影响因子：
--
作者：
萩原啓雅;渡辺信子;松本正勝
通讯作者：
松本正勝