Breaking seed dormancy in European rowan seeds and its implications for regeneration
Breaking seed dormancy in European rowan seeds and its implications for regeneration
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DOI：
10.1007/s11056-013-9362-z
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发表时间：
2013-07-01
期刊：
影响因子：
2.2
通讯作者：
O'Reilly, Conor
中科院分区：
文献类型：
--
作者：
Afroze, Farhana;O'Reilly, Conor
以欧洲花楸（SorbusaucupariaL.）种子为材料，研究了培养基、种子含水量、温处理和冷处理对花楸种子萌发的影响。研究爱尔兰来源的种子，目的是减少早熟（或早熟）发芽和使预处理后的发芽最大化。在调节种子水分含量后，对两批种子进行0-6周的温热处理，然后进行0-50周的冷却。然后使种子在恒定的15 A ° C和每天8小时光照或20（暗）/30 A ° C（光）下发芽。一些种子在培养基中以完全吸胀（FI）状态处理（标准操作处理）。种子批效应是明显的，但处理效果是一致的，在每个批次。热处理大大提高了种子的发芽率，降低了种子的早熟现象。不需要培养基的存在来实现高发芽，并且需要接近FI状态的种子水分含量来最大化发芽。气候变化可能会降低该物种自然再生的能力，有利于其他需要较少寒冷的物种。
The effects of the presence of a medium, seed moisture content, warm and chilling treatments on the germination response of European rowan (Sorbus aucuparia L.) seeds of Irish origin were investigated with the aim of reducing precocious (or premature) germination and maximising germination after pretreatment. After adjusting seed moisture content, seeds of two lots were subjected to warm treatment for 0-6 weeks followed by 0-50 weeks of chilling. The seeds then were allowed to germinate at a constant 15 A degrees C with 8 h lighting per day or 20 (dark)/30 A degrees C (light). Some seeds were treated in the fully imbibed (FI) state in a medium (standard operational treatment). Seed lot effects were evident, but treatment effects were consistent in each lot. Warm treatment greatly increased germination and reduced precocious germination. The presence of a medium was not required to achieve high germination and seed moisture content close to the FI state was needed to maximise germination. Climate change may reduce the ability of this species to regenerate naturally, favouring other species that require less chilling.