An analysis of dormancy, ABA responsiveness, after-ripening and pre-harvest sprouting in hexaploid wheat (Triticum aestivum L.) caryopses.
An analysis of dormancy, ABA responsiveness, after-ripening and pre-harvest sprouting in hexaploid wheat (Triticum aestivum L.) caryopses.
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在六藻型小麦（Triticum aestivum L.）Caryopses中的休眠，ABA反应性，成熟后和收获前发芽的分析。
DOI：
10.1093/jxb/erp329
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发表时间：
2010
影响因子：
6.9
通讯作者：
Holdsworth MJ
中科院分区：
文献类型：
--
作者：
Gerjets T;Scholefield D;Foulkes MJ;Lenton JR;Holdsworth MJ
研究了6个小麦品种的胚和颖果休眠、脱落酸（ABA）响应、成熟后（AR）和收获前发芽紊乱（PHS）。颖果AR的发生时间在品种间存在差异；稻瘟病最敏感的稻瘟病发生在收获成熟前，而稻瘟病最抗性的稻瘟病发生最慢。在AR过程中，所有品种的全颖果对aba的反应都不明显；赤霉病敏感品种在抗旱期初期表现出一定的反应性，而赤霉病抗性品种在整个抗旱期均表现出一定的反应性。在灌浆过程中，离体胚的休眠时间相对较短，大多数品种在干物质积累最多的时期（生理成熟期）表现出aba响应性下降的窗口期。对小灵通的易感性进行了评估，在AR期间对分离穗或整株进行了顶雾处理；两种方法均能明显区分品种。通过这些分析，可以对6个品种种子发育、室室和环境的不同组成部分之间的相互作用进行研究。颖果AR的速度与胚休眠和种子成熟过程中aba的响应性无直接关系。然而，一个品种的AR速度与AR期间小灵通的敏感性密切相关，表明这些性状是发育相关的。因此，研究AR的遗传成分可能有助于降低小灵通易感性的育种方法。
Embryo and caryopsis dormancy, abscisic acid (ABA) responsiveness, after-ripening (AR), and the disorder pre-harvest sprouting (PHS) were investigated in six genetically related wheat varieties previously characterized as resistant, intermediate, or susceptible to PHS. Timing of caryopsis AR differed between varieties; AR occurred before harvest ripeness in the most PHS-susceptible, whereas AR was slowest in the most PHS-resistant. Whole caryopses of all varieties showed little ABA-responsiveness during AR; PHS-susceptible varieties were responsive at the beginning of the AR period whereas PHS-resistant showed some responsiveness throughout. Isolated embryos showed relatively little dormancy during grain-filling and most varieties exhibited a window of decreased ABA-responsiveness around the period of maximum dry matter accumulation (physiological maturity). Susceptibility to PHS was assessed by overhead misting of either isolated ears or whole plants during AR; varieties were clearly distinguished using both methods. These analyses allowed an investigation of the interactions between the different components of seed development, compartments, and environment for the six varieties. There was no direct relationship between speed of caryopsis AR and embryo dormancy or ABA-responsiveness during seed maturation. However, the velocity of AR of a variety was closely associated with the degree of susceptibility to PHS during AR suggesting that these characters are developmentally linked. Investigation of genetic components of AR may therefore aid breeding approaches to reduce susceptibility to PHS.
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影响因子：
7.4
作者：
Gubler, Frank;Hughes, Trijntje;Jacobsen, John
通讯作者：
Jacobsen, John
影响因子：
5.8
作者：
Biddulph, T. B.;Plummer, J. A.;Mares, D. J.
通讯作者：
Mares, D. J.
影响因子：
7.2
作者：
Carrera, Esther;Holman, Tara;Holdsworth, Michael J.
通讯作者：
Holdsworth, Michael J.
影响因子：
6.9
作者：
Kawakami, N;Miyake, Y;Noda, K
通讯作者：
Noda, K
影响因子：
2.1
作者：
Benech-Arnold, RL;Giallorenzi, MC;Rodriguez, V
通讯作者：
Rodriguez, V