比较地中海地区用作或可能用作观赏植物的本地和非本地物种对气候变化的耐受性

P. Soriano, Reyes Mora, E. Estrelles, M. I. Martínez-Nieto
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引用次数: 0

摘要

由于气候变化,温度和降雨机制正在发生变化,威胁到世界许多地区现有园艺概念的生存。这种情况凸显了研究其他物种潜力的必要性,尤其是在地中海盆地等较为敏感的地区。这项研究的目的是研究适应性物种的恢复能力,以促进可持续园艺的发展。为此,研究人员选取了三个科(苋科、唇形科和菊科)中用作或可能用作观赏植物的七个物种,比较它们在发芽阶段对不同温度水平(10 ° C 至 35 ° C)和 PEG 6000 产生的水分压力(-0.10 兆帕至-2.5 兆帕)的耐受性。计算了发芽率、平均发芽时间、基础温度、热时间、基础水势和水分时间。结果表明,大多数物种对高温和低渗透压都有良好的反应,在某些胁迫水平下,发芽率甚至有所提高。到目前为止,在高水压条件下,对立面莎草的发芽率最高,在高温条件下次之。外来物种银合欢(Celosia argentea)的特殊反应凸显了其成为入侵物种的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of the Climate Change Tolerance of Native and Non-Native Species Used or Potentially Used as Ornamentals in Mediterranean Areas
As a consequence of climate change, temperature and rainfall regimes are being modified, threatening the survival of the current gardening concept in many areas of the world. This situation highlights the need to investigate the potential of other species, especially in more sensitive areas such as the Mediterranean Basin. The aim of this research is to study the resilience of adapted species to promote sustainable gardening. To achieve this, seven species belonging to three families (Amaranthaceae, Lamiaceae and Asteraceae) used or potentially used as ornamentals were selected to compare their tolerance at the germinative stage to different levels of temperature (10 °C to 35 °C) and water stress created by PEG 6000 (−0.10 MPa to −2.5 MPa). Germination percentage, mean germination time, base temperature, thermal time, base water potential and hydrotime were calculated. The results showed a good response to high temperature and low osmotic potential in most of the species, and germination even increased under certain stress levels. Salsola oppositifolia presented by far the best results in terms of germination under high-water-stress conditions and the second best at high temperatures. The extraordinary response of Celosia argentea, an alien species, highlighted the risk of it becoming an invasive species.
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