Crown branching and cropping potential in strawberry (Fragaria X ananassa Duch.) can be enhanced by daylength treatments
Crown branching and cropping potential in strawberry (Fragaria X ananassa Duch.) can be enhanced by daylength treatments
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DOI：
10.1080/14620316.2004.11511791
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发表时间：
2004-05-01
影响因子：
1.9
通讯作者：
Junttila, O
中科院分区：
文献类型：
--
作者：
Hytönen, T;Palonen, P;Junttila, O
草莓（Fragaria X ananassa Duch.）在温室中生产，通常一年收获两次;在秋季和春季。为了提高生产力，需要新的种植技术。本研究的目的是研究日照长度处理对草莓植物的性能的影响，以改善植物生产协议。通过将品种Korona的植物暴露于连续两个短日照（SD）处理，然后冷藏，探索了在强迫期间获得两个连续作物的可能性。研究了以下日照长度处理：3 wk SD + 2 wk长日照（LD）+ 3 wk SD（3SD 2LD 3SD）、3 wk SD + 4 wk LD + 3 wk SD（3SD 4LD 3SD）和10 wk SD（10 SD）。此外，在经受SD处理的植物中研究了冠分枝。两个连续的SD处理，使两个连续的开花期和收获期在温室强迫冷藏8周后。第一次SD处理引起冠分枝并诱导主冠顶端分生组织和最老的腋生组织开花，而在第二次SD处理期间诱导了较年轻的腋生组织。3SD、4LD、3SD和10 SD的商品产量和花序数相当，但3SD、2LD、3SD的商品产量和花序数明显低于10 SD。然而，这项研究表明，高种植潜力的人工SD处理的植物，这使他们成为一个潜在的替代温室草莓栽培。可通过使幼株经受三周SD处理来产生“Korona”的多冠植物，并且冠枝可通过新的SD处理诱导开花，从而导致非常高的种植潜力。诱导后的植株可在-1 ℃下贮藏，以备后用。
When strawberries (Fragaria X ananassa Duch.) are produced in a greenhouse, usually two crops a year are obtained; in the fall and in the spring. To increase productivity, new cultivation techniques are needed. The aim of this study was to examine the effect of daylength treatments on the performance of strawberry plants to improve plant production protocols. The possibility of obtaining two successive crops during forcing was explored by exposing plants of cultivar Korona to two successive short day (SD) treatments followed by cold storage. The following daylength treatments were studied: 3 wk SD + 2 wk long day (LD) + 3 wk SD (3SD2LD3SD), 3 wk SD + 4 wk LD + 3 wk SD (3SD4LD3SD), and 10 wk SD (10SD). In addition, crown branching was studied in plants subjected to SD treatments. Two successive SD treatments enabled two successive flowering and cropping periods during greenhouse forcing after eight weeks of cold storage. The first SD treatment caused crown branching and induced flowering in the apical meristem of the main-crown and in the oldest axillary meristem(s), whereas younger axillary meristems were induced during the second SD treatment. Marketable yield and the number of inflorescences were comparable in 3SD4LD3SD and 10SD, but considerably lower in 3SD2LD3SD. However, this study demonstrated the high cropping potential of artificially SD treated plants, which makes them a potential alternative for greenhouse strawberry cultivation. Multi-crowned plants of 'Korona' can be produced by subjecting young plants to a three week SD treatment, and crown branches can be induced to flowering by a new SD treatment resulting in a very high cropping potential. Induced plants can be stored at -1degreesC for later forcing.