Effects of Physical, Mechanical and Hormonal Treatments of Seed-Tubers on Bud Dormancy and Plant Productivity
Effects of Physical, Mechanical and Hormonal Treatments of Seed-Tubers on Bud Dormancy and Plant Productivity
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DOI：
10.3390/agronomy10010033
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发表时间：
2020-01-01
期刊：
影响因子：
3.7
通讯作者：
Ledda, Luigi
中科院分区：
文献类型：
--
作者：
Deligios, Paola A.;Rapposelli, Emma;Ledda, Luigi
本研究的目的是开发一种易于应用的技术，以诱导种子块茎休眠的打破。在一项为期两年的研究中，通过单独或与赤霉素结合使用、将种子块茎切成一半和早期杀死茎来评估不同的温度效应，测试了七种以上打破休眠的处理。每年考虑三个品种：斯彭塔和蒙娜丽莎(中长期休眠)，第一年的欧罗巴和第二年的阿琳达(均以短休眠期为特征)。我们发现，首先，欧罗巴和阿琳达对热处理反应迅速，其次是结合赤霉素的应用对相同的热处理有反应。虽然不容易应用，特别是当必须处理大量种薯时(种薯生产者)，切割一半的种薯也有令人满意的结果。尽管两个实验之间的处理并没有完全重叠，但结果在质量上是相似的。因此，这些发现使我们得出结论，在20℃下进行采后贮藏，然后在收获后38天用赤霉酸处理，在解除休眠方面最有效，在确保良好的营养生长和田间水平的生产表现方面，无论品种如何。
The aim of this study was to develop a technique easy to apply in order to induce seed-tuber dormancy breakage. Over a two-year study, more than seven dormancy-breaking treatments were tested through evaluating different temperature effects alone or combined with gibberellins application, cutting in half of seed-tubers, and early haulm killing. Three varieties per year were considered: Spunta and Monalisa (medium and long dormancy) in both years, Europa during the first year and Arinda during the second year (both characterized by a short dormancy period). We found firstly that Europa and Arinda promptly responded to thermal treatments, and secondly to the same thermal treatments in combination with the application of gibberellins. Although not easily applicable, especially when a large volume of seed-tubers has to be handled (seed-tuber producers), the cutting in half of the seed-tubers also had a satisfactory result. Notwithstanding that treatments did not perfectly overlap between the two experiments, results were qualitatively similar. Therefore, these findings allow us to conclude that treatment with post-harvest storage at 20 degrees C, followed by a treatment with gibberellic acid at 38 days from harvesting, is the most efficient in releasing dormancy, in ensuring a good vegetative growth and productive performance at field-level irrespective of the variety.