将荚蒾种子暴露在不同的温度下会影响其萌发特性

IF 1.7 4区农林科学 Q2 AGRONOMY

Seed Science and Technology Pub Date : 2022-01-01 DOI:10.15258/sst.2022.50.2.07

Mark Baah-Acheamfour, J. Sobze

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引用次数: 0

摘要

对许多Viburnum物种来说，暴露于两种不同的分层序列──从暖到冷或从冷到暖──可能会打破胚胎休眠，从而启动重要的发芽。收集紫荚豆种子，通过冷暖(4/20°C)或暖冷(20/4°C)分层，以更好地了解哪种温度序列和持续时间能提高发芽率(GRP)、平均发芽时间(MGT)、发芽同步(SYN)和不确定度(UNC)，以及种子达到50%发芽时间(t50)。与冷暖层序相比，冷暖层序的种子平均GRP提高24%，MGT减少216 d, t50减少97 d。冷暖序列在提高SYN指数(0.94比0.51)和降低UNC指数(0.21比0.96)方面优于冷暖序列。

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Exposing Viburnum edule seeds to a sequence of temperatures affects the germination characteristics

For many species of Viburnum, exposure to two distinct stratification sequences ─ warm to cold or cold to warm ─ may break embryo dormancy to initiate significant germination. Seeds of Viburnum edule were collected and moved through a series of cold-warm (4/20°C) or warm-cold (20/4°C) stratification to better understand precisely which temperature sequences and duration improve germination percentage (GRP), mean germination time (MGT), germination synchrony (SYN) and uncertainty (UNC), and time for seeds to reach 50% germination (t50). Seeds kept in cold-warm temperature sequences, on average, improved GRP by 24%, reduced MGT by 216 days and t50 by 97 days compared with those in the warm-cold stratification sequence. The warm-cold temperature sequence was more advantageous in improving the SYN (0.94 vs. 0.51) and reducing the UNC (0.21 vs. 0.96) indices than the cold-warm temperature sequence.

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来源期刊

Seed Science and Technology 农林科学-农艺学

CiteScore

3.00

自引率

28.60%

发文量

审稿时长

>36 weeks

期刊介绍： Seed Science and Technology (SST) is an international journal featuring original papers and articles on seed quality and physiology related to seed production, harvest, processing, sampling, storage, genetic conservation, habitat regeneration, distribution and testing. A journal that meets the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality. Published every April, August and December.