Effect of alternating day and night temperature on short day-induced bud set and subsequent bud burst in long days in Norway spruce.
Effect of alternating day and night temperature on short day-induced bud set and subsequent bud burst in long days in Norway spruce.
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DOI：
10.3389/fpls.2014.00691
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发表时间：
2014
影响因子：
5.6
通讯作者：
Junttila O
中科院分区：
文献类型：
--
作者：
Olsen JE;Lee Y;Junttila O
针叶树挪威云杉的幼苗表现出短日照（SD）诱导的顶端生长和芽的停止。虽然不同的，恒定的温度下SD被称为调制时间的芽设置和深度的休眠与发展更深的休眠下较高的温度相比，较低的温度，系统的研究交替白天（DT）和夜间温度（NT）的影响是有限的。为了阐明这一点，不同种源的挪威云杉幼苗在芽发育期间暴露于各种DT-NT组合，然后直接或在不同的寒冷时期后转移到长日（LD）和18 ° C的强迫条件下。虽然没有具体的影响交替DT/NT被发现，结果表明，DT下SD对芽的设置和随后的芽断裂的影响显着修改NT在一个复杂的方式。对芽的萌发的影响在冷后持续存在。由于在18 ° C和21 ° C的DT下，在SD下，出芽时间与日平均温度相关，而不是DT为15 ° C，出芽时间显然也取决于特定DT，这意味着NT的效果取决于实际DT。虽然较高的温度下SD一般会导致较晚的芽打破后转移到强迫条件下，最快的芽冲洗观察到在中间NT。这可能是由于与较高温度相比，中间体具有加速芽萌发的低温效应，并且在较低温度下延迟芽发育到可以发生芽萌发的阶段。此外，在非冷藏苗芽爆裂的时间下降，增加SD持续时间，这表明芽发育必须达到一定的阶段之前，导致芽爆裂的过程开始。本研究结果还表明，在芽发育过程中的低温有较大的影响，最南部相比，最北方种源研究。在未冷藏和冷藏植物中，随着原产地北方纬度的增加，观察到萌芽时间缩短。总之，作为一个高度温度依赖性的过程，芽发育强烈延迟低温，DT的影响显着修改NT在一个复杂的方式。
Young seedlings of the conifer Norway spruce exhibit short day (SD)-induced cessation of apical growth and bud set. Although different, constant temperatures under SD are known to modulate timing of bud set and depth of dormancy with development of deeper dormancy under higher compared to lower temperature, systematic studies of effects of alternating day (DT) and night temperatures (NT) are limited. To shed light on this, seedlings of different provenances of Norway spruce were exposed to a wide range of DT-NT combinations during bud development, followed by transfer to forcing conditions of long days (LD) and 18°C, directly or after different periods of chilling. Although no specific effect of alternating DT/NT was found, the results demonstrate that the effects of DT under SD on bud set and subsequent bud break are significantly modified by NT in a complex way. The effects on bud break persisted after chilling. Since time to bud set correlated with the daily mean temperature under SD at DTs of 18 and 21°C, but not a DT of 15°C, time to bud set apparently also depend on the specific DT, implying that the effect of NT depends on the actual DT. Although higher temperature under SD generally results in later bud break after transfer to forcing conditions, the fastest bud flush was observed at intermediate NTs. This might be due to a bud break-hastening chilling effect of intermediate compared to higher temperatures, and delayed bud development to a stage where bud burst can occur, under lower temperatures. Also, time to bud burst in un-chilled seedlings decreased with increasing SD-duration, suggesting that bud development must reach a certain stage before the processes leading to bud burst are initiated. The present results also indicate that low temperature during bud development had a larger effect on the most southern compared to the most northern provenance studied. Decreasing time to bud burst was observed with increasing northern latitude of origin in un-chilled as well as chilled plants. In conclusion, being a highly temperature-dependent process, bud development is strongly delayed by low temperature, and the effects of DT is significantly modified by NT in a complex manner.
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影响因子：
3.6
作者：
Lee, Yeon Kyeong;Alexander, Danny;Olsen, Jorunn Elisabeth
通讯作者：
Olsen, Jorunn Elisabeth
DOI：
10.1139/b93-153
发表时间：
1993-10-01
期刊：
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
影响因子：
--
作者：
MACDONALD, JE;OWENS, JN
通讯作者：
OWENS, JN
影响因子：
1.8
作者：
Junttila, O;Nilsen, J;Igeland, B
通讯作者：
Igeland, B
影响因子：
9.2
作者：
Koini, Maria A.;Alvey, Liz;Franklin, Keara A.
通讯作者：
Franklin, Keara A.
影响因子：
4
作者：
MYKING, T;HEIDE, OM
通讯作者：
HEIDE, OM