Husk to caryopsis adhesion in barley is influenced by pre- and post-anthesis temperatures through changes in a cuticular cementing layer on the caryopsis.
Husk to caryopsis adhesion in barley is influenced by pre- and post-anthesis temperatures through changes in a cuticular cementing layer on the caryopsis.
复制标题
DOI：
10.1186/s12870-017-1113-4
复制
发表时间：
2017-10-23
影响因子：
5.3
通讯作者：
Hoad SP
中科院分区：
文献类型：
--
作者：
Brennan M;Shepherd T;Mitchell S;Topp CFE;Hoad SP
成熟时，大麦的外壳被“覆盖”，紧紧地附着在下面的颖果上。颖果上的表皮粘合层是谷壳粘附所必需的，然而，粘附的质量在产生粘合层的品种之间差异很大，导致经济上重要的麦芽缺陷，谷粒结皮。胶结层的组成，和粮食器官的发展已被假设影响谷壳粘附的质量。大麦'协奏曲'的植物生长在不同的温度下开花前和开花后的影响变化的发展的外壳，颖果和角质粘合层，以确定这些变量如何影响质量的外壳颖果粘合。开花前的温暖条件降低了谷壳粘附的质量，从而增加了籽粒结皮的发生率。冷开花后条件进一步降低了谷壳粘附的质量。粘合层的组成而不是其结构因外壳粘合质量而不同。这胶结层产生于后期牛奶阶段，发生在9和29天开花后，条件依赖于温度的增长速度。十八醇、三十烷、菜油甾醇和β-谷甾醇等化合物在种皮中含量最高。粘附质量的差异是不是由于不兼容的外壳和颖果尺寸影响器官接触。这项研究表明，外壳颖果粘附是依赖于胶结层的组成，这意味着该组合物是由温度调节之前，在粮食发展。了解这一规定将是关键，以提高外壳颖果粘附。本文的在线版本（doi：10.1186/s12870-017-1113-4）包含补充材料，可供授权用户使用。
At ripeness, the outer husk of “covered” barley grains firmly adheres to the underlying caryopsis. A cuticular cementing layer on the caryopsis is required for husk adhesion, however the quality of adhesion varies significantly among cultivars which produce the cementing layer, resulting in the economically important malting defect, grain skinning. The composition of the cementing layer, and grain organ development have been hypothesised to influence the quality of husk adhesion. Plants of Hordeum vulgare ‘Concerto’ were grown at different temperatures pre- and post-anthesis to effect changes in the development of the husk, caryopsis and cuticular cementing layer, to determine how these variables influence the quality of husk-to-caryopsis adhesion. Warm conditions pre-anthesis decreased the quality of husk adhesion, and consequently increased the incidence of grain skinning. Cool post-anthesis conditions further decreased the quality of husk adhesion. The composition of the cementing layer, rather than its structure, differed with respect to husk adhesion quality. This cementing layer was produced at the late milk stage, occurring between nine and 29 days post-anthesis, conditional on the temperature-dependent growth rate. The compounds octadecanol, tritriacontane, campesterol and β-sitosterol were most abundant in caryopses with high-quality husk adhesion. The differences in adhesion quality were not due to incompatible husk and caryopsis dimensions affecting organ contact. This study shows that husk-to-caryopsis adhesion is dependent on cementing layer composition, and implies that this composition is regulated by temperature before, and during grain development. Understanding this regulation will be key to improving husk-to-caryopsis adhesion. The online version of this article (doi: 10.1186/s12870-017-1113-4) contains supplementary material, which is available to authorized users.
登录
查看更多内容
影响因子：
2.6
作者：
Agu, Reginald C.;Bringhurst, Thomas A.;Brosnan, James M.
通讯作者：
Brosnan, James M.
通过覆盖/裸大麦（Hordeum vulgare L.）的比较转录组分析揭示了壳-颖果粘附/分离的分子机制。
影响因子：
5.6
作者：
Duan R;Xiong H;Wang A;Chen G
通讯作者：
Chen G
影响因子：
3.8
作者：
GIESE, BN
通讯作者：
GIESE, BN
影响因子：
9.4
作者：
Espana, Laura;Heredia-Guerrero, Jose A.;Dominguez, Eva
通讯作者：
Dominguez, Eva
DOI：
10.21273/jashs.123.3.348
发表时间：
1998-05-01
影响因子：
1.9
作者：
Belding, RD;Blankenship, SM;Leidy, RB
通讯作者：
Leidy, RB