Enhanced UV-B and elevated CO(2) impacts sub-arctic shrub berry abundance, quality and seed germination.
Enhanced UV-B and elevated CO(2) impacts sub-arctic shrub berry abundance, quality and seed germination.
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UV-B 增强和 CO(2) 升高会影响亚北极灌木浆果的丰度、质量和种子发芽。
DOI：
10.1007/s13280-012-0311-4
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发表时间：
2012
期刊：
影响因子：
6.5
通讯作者：
Gwynn-Jones D
中科院分区：
文献类型：
--
作者：
Gwynn-Jones D
本研究调查了长期增强的 UV-B 以及将 UV-B 与升高的 CO2 相结合对亚北极石南群落矮灌木浆果特性的影响。在升高的 UV-B 下产生的种子中越橘的发芽率得到增强，但种子数量和浆果大小不受影响。升高的UV-B和CO2刺激了V.myrtillus浆果的丰度，而单独的UV-B则刺激了V.vitis-idaea和Empetrum hermaphroditum的浆果丰度。增强的 UV-B 降低了桃金娘浆果中几种多酚类物质的浓度，而升高的 CO2 增加了桃金娘浆果中的槲皮素糖苷以及两性桃金娘浆果中的注射素糖苷和花青素。在V.myrtillusberry 中发现了总花青素、delphinidin-3-hexoside 和peonidin-3-pentosidein 的UV-B × CO2 相互作用，但E.hermaphroditum 中没有。结果表明 UV-B 对 V.myrtillus 的发芽产生积极影响，并且 UV-B × 升高的 CO2 对浆果丰度和质量产生特定物种的影响。这些发现对人类和动物消费者以及种子传播和幼苗建立具有相关性和影响。
This study investigated the effects of long-term-enhanced UV-B, and combined UV-B with elevated CO2on dwarf shrub berry characteristics in a sub-arctic heath community. Germination ofVaccinium myrtilluswas enhanced in seeds produced at elevated UV-B, but seed numbers and berry size were unaffected. Elevated UV-B and CO2stimulated the abundance ofV.myrtillusberries, whilst UV-B alone stimulated the berry abundance ofV.vitis-idaeaandEmpetrum hermaphroditum. Enhanced UV-B reduced concentrations of several polyphenolics inV.myrtillusberries, whilst elevated CO2increased quercetin glycosides inV.myrtillus, and syringetin glycosides and anthocyanins inE.hermaphroditumberries. UV-B × CO2interactions were found for total anthocyanins, delphinidin-3-hexoside and peonidin-3-pentosidein inV.myrtillusberries but notE.hermaphroditum. Results suggest positive impacts of UV-B on the germination ofV.myrtillusand species-specific impacts of UV-B × elevated CO2on berry abundance and quality. The findings have relevance and implications for human and animal consumers plus seed dispersal and seedling establishment.