Water Uptake and Germination of Caper (Capparis spinosa L.) Seeds
Water Uptake and Germination of Caper (Capparis spinosa L.) Seeds
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DOI：
10.3390/agronomy10060838
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发表时间：
2020-06-01
期刊：
影响因子：
3.7
通讯作者：
Pascual-Seva, Nuria
中科院分区：
文献类型：
--
作者：
Laura Foschi, Maria;Juan, Mariano;Pascual-Seva, Nuria
山柑是一种多年生落叶亚灌木，几乎生长在所有地中海沿岸国家。根据文献记载，引起刺山柑种子发芽率低的休眠类型有生理休眠（PD）、物理休眠（PY）和组合休眠（PY + PD）。我们进行了三个实验，分析不同年龄，种源，种子的吸胀，生活力和发芽率和种子覆盖的恶化程度。测试的标准种子的商业化批次中没有一个超过6%的发芽率，也没有一个超过35%的活力，而自有种子在两个参数中均达到90%，表明所有有活力的种子都发芽了。种子水分含量沿着浸泡期遵循种子萌发中典型的水分吸收三相模型的前两个阶段：吸胀和滞后阶段（分别为萌发的I期和II期）。种子水化开始通过肺门区域。所有有活力的自有种子都发芽的事实，连同它们的含水量低于标准种子的含水量，表明刺山柑种子不具有严格意义上的不透水的包衣，即，它们不显示PY;然而，需要使用赤霉酸以获得高发芽百分比，证明了PD的存在。
Caper is a perennial deciduous sub-shrub that grows in almost all circum-Mediterranean countries. The specialized literature presents three possible dormancy types that can cause low germination of caper seeds: Physiological dormancy (PD), physical dormancy (PY), and combinational dormancy (PY + PD). We conducted three experiments to analyze the imbibition, viability, and germination of seeds of different ages, provenances, and the level of deterioration of the seed cover. None of the commercialized lots of standard seeds tested exceeded 6% germination, nor 35% viability, while the owned seeds reached 90% in both parameters, indicating that all viable seeds germinated. The seed moisture content along the soaking period followed the first two phases of the typical triphasic model of water uptake in seed germination: The imbibition and lag phases (phase I and II of germination, respectively). Seed hydration began through the hilar region. The fact that all viable owned seeds germinated, together with their moisture content being lower than that of standard seeds, indicated that caper seeds do not have a water-impermeable coat sensu stricto, i.e., they do not show PY; nevertheless, the need to use gibberellic acid to obtain high germination percentages, demonstrated the presence of PD.