Seed germination conditions and implications for establishment of an epiphyte, Aechmea bracteata (Bromeliaceae)
Seed germination conditions and implications for establishment of an epiphyte, Aechmea bracteata (Bromeliaceae)
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DOI：
10.1007/s11258-009-9582-7
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发表时间：
2009-10-01
期刊：
影响因子：
1.7
通讯作者：
Allen, Michael F.
中科院分区：
文献类型：
--
作者：
Goode, Laurel K.;Allen, Michael F.
在墨西哥和巴拿马南部的热带森林中发现了一种常见的附生凤梨属植物，与许多其他物种共生。考虑到它在这些森林中的重要性和分布，我们提出了一个问题，即如何将苞片蒿恢复到它们过去生长旺盛的地区？本研究首先在可控的生长室条件下，研究了种子活力和种子萌发对温度、湿度、蒸汽压差（VPD）和光照的响应。我们在一个季节性的热带森林中记录了这些环境条件，在那里这种植物很常见，然后在不同的几个阶段进行种子发芽试验。在恒定供水条件下，最高温度和最低VPD水平下的萌发率最高。田间发芽率低于1%。由于高温和早期几个阶段的VPD，在小于20年的森林中重新引入苞片蒿的努力不太可能成功。
Aechmea bracteata is a common epiphytic bromeliad found in symbiosis with many other species throughout tropical forests of Mexico and south through Panama. Given its importance and distribution in these forests, we asked how may A. bracteata be restored to areas where they have thrived in the past? We first investigated seed viability and response of seed germination to temperature, humidity, vapour pressure deficit (VPD), and light, under controlled growth chamber conditions. We recorded these environmental conditions within a seasonal tropical forest where this species is common and then conducted seed germination trials in various seral stages. In growth chambers, with constant water supply, highest germination percentages were at the highest temperature and lowest VPD levels. In the field, germination was less than 1%. Because of high temperatures and VPD within early seral stages, efforts to re-introduce A. bracteata into forests < 20 years old are not likely to be successful.