Endosperm development in Brachypodium distachyon.
Endosperm development in Brachypodium distachyon.
复制标题
DOI：
10.1093/jxb/erq309
复制
发表时间：
2011-01
影响因子：
6.9
通讯作者：
Drea S
中科院分区：
文献类型：
--
作者：
Opanowicz M;Hands P;Betts D;Parker ML;Toole GA;Mills EN;Doonan JH;Drea S
尽管谷物是我们最重要的食物来源，但人们对禾本科植物的谷物发育及其进化仍然知之甚少。谷物，许多草种已经驯化，是一个单种子果实突出和持久的胚乳。短柄草（Brachypodium distachyon）是一种小型野生牧草，被认为是温带小粒谷物的新模式系统，但其胚乳发育情况及其与驯化谷物的比较尚不清楚。构建了发育中的短柄柄胚乳结构域的细胞和分子图谱。这为参考菌株Bd21提供了短柄植物籽粒发育的首次详细描述，为今后的遗传和比较研究提供了有用的资料。并将短柄花序的籽粒发育与小麦进行了比较。值得注意的是，糊粉粉不像小麦那样具有区域分化，这表明修饰的糊粉粉区可能只是谷物的一个子集的特征。此外，中央胚乳和珠心表皮含有异常突出的细胞壁，可以作为储存材料。这些细胞壁的组成更接近大麦和燕麦的细胞壁，而不是小麦的细胞壁。因此，尽管小麦的胚乳发育与温带小粒谷物大致相似，但也存在显著差异，这可能反映了其在小麦科和水稻之间的系统发育位置。
Grain development and its evolution in grasses remains poorly understood, despite cereals being our most important source of food. The grain, for which many grass species have been domesticated, is a single-seeded fruit with prominent and persistent endosperm. Brachypodium distachyon, a small wild grass, is being posited as a new model system for the temperate small grain cereals, but little is known about its endosperm development and how this compares with that of the domesticated cereals. A cellular and molecular map of domains within the developing Brachypodium endosperm is constructed. This provides the first detailed description of grain development in Brachypodium for the reference strain, Bd21, that will be useful for future genetic and comparative studies. Development of Brachypodium grains is compared with that of wheat. Notably, the aleurone is not regionally differentiated as in wheat, suggesting that the modified aleurone region may be a feature of only a subset of cereals. Also, the central endosperm and the nucellar epidermis contain unusually prominent cell walls that may act as a storage material. The composition of these cell walls is more closely related to those of barley and oats than to those of wheat. Therefore, although endosperm development is broadly similar to that of temperate small grain cereals, there are significant differences that may reflect its phylogenetic position between the Triticeae and rice.
登录
查看更多内容
影响因子：
64.8
作者：
Matsumoto, T;Wu, JZ;Sugiura, M
通讯作者：
Sugiura, M
影响因子：
11.4
作者：
FOBERT, PR;COEN, ES;DOONAN, JH
通讯作者：
DOONAN, JH
影响因子：
11.6
作者：
Drea, S;Leader, DJ;Doonan, JH
通讯作者：
Doonan, JH
影响因子：
5.1
作者：
Doan, DNP;Linnestad, C;Olsen, OA
通讯作者：
Olsen, OA
影响因子：
3.3
作者：
Gill, Bikram S.;Appels, Rudi;Sasaki, Takuji
通讯作者：
Sasaki, Takuji