Direct Effects on Seed Germination of 17 Tree Species under Elevated Temperature and CO2 Conditions

作者：Kim Du Hyun; Han Sim Hee^*

来源：Open Life Sciences, 2018, 13(1): 137-148.

DOI：10.1515/biol-2018-0019

• germination percent
• mean germination time
• needle-leaf
• broad-leaf
• seed germination characteristics

Effects on seed germination characteristics of 17 tree species were investigated under elevated temperature and CO2. Seeds of 5 needle-leaf and 12 broad-leaf species were germinated under four conditions: 24 degrees C + 400 mu mol CO2 mol air(1), 24 degrees C + 750 mu mol CO2 mol air(1), 27 degrees C + 400 mu mol CO2 mol air(1), and 27 degrees C + 750 mu mol CO2 mol The elevated temperature and CO2 affected germination percent (GP) of 7 tree species seeds. GPs of Pinus densiflora, P. thunbergii, Betula ermanii, and Maackia amurensis seeds were affected by the elevated temperature, while only that of P. jezoensis seed was influenced by the elevated CO2. GPs of Malus baccata and Zelkova serrata seeds were influenced by both the elevated temperature and CO2. In addition, the elevated temperature and CO(2 )also affected mean germination time (MGT) of 12 tree species seeds. Particularly, MGTs of P. thunbergii and Rhododendron tschonoskii seeds were influenced by both factors. In conclusion, elevated temperature and CO2 affected seed germination characteristics, which were reflected by significant differences among tree species. Specifically, these two factors exerted stronger influence on germination pattern such as MGT rather than seed germination percent.

• 出版日期2018