文献类型：期刊文献

英文题名：Seed germination traits and dormancy classification of 27 species from a degraded karst mountain in central Yunnan-Guizhou Plateau: seed mass and moisture content correlate with germination capacity

作者：Wang, J.[1,2] Wang, X. Y.[3] Pan, W.[1] Li, J. Y.[1] Xue, L.[1,2] Li, S.[1,2]

第一作者：Wang, J.;王佳

通信作者：Li, S[1];Li, S[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China;[2]Observat & Res Stn Rock Desert Ecosyst, Puding 562100, Peoples R China;[3]Chunan Cty Forestry Adm, Hangzhou, Peoples R China

年份：0

外文期刊名：PLANT BIOLOGY

收录：;Scopus(收录号：2-s2.0-85134476694);WOS:【SCI-EXPANDED(收录号:WOS:000828559700001)】；

基金：This work was supported by Fundamental Research Funds of CAF (Grant No. CAFYBB2020SY017) and National Natural Science Foundation of China (Grant No. 32101597).

语种：英文

外文关键词：Degraded karst vegetation; germination; seed traits; seed-based restoration

摘要：In degraded karst ecosystem, vegetation restoration efforts almost exclusively rely on planted seedlings, but this is not effective to maintain community diversity and resilience. As seed functional traits, seed dormancy and germination are key to community assembly. Unfortunately, these elements are commonly overlooked in restoring degraded ecosystems. This work classifies seed dormancy of 27 species with different life forms that are common on a degraded karst mountain. We examined the effects of temperature regime and light conditions on percentage germination and assessed the relationships between seed traits and germination index using a partial least squares regression (PLSR). Approximately 48% of the investigated species had physiological dormancy, 37% were non-dormant, 7% had morphophysiological dormancy, 4% had morphological dormancy and 4% had physical dormancy. We found that 94% (15 out of 16) species had maximum germination in warm temperature regimes (20/13 and 25/18 degrees C), while the remaining species required cool temperatures (10/4 degrees C). PLSR analysis indicated a significant positive correlation between seed mass and T-50m (time to 50% final germination), and a negative correlation between seed moisture content and percentage germination. Our findings indicate that seed traits are important factors in seed-based restoration practice. F. esculentum, O. opipara, P. fortuneana and S. salicifolia are recommended for direct seeding during the early rainy season to restore seriously degraded lands in subtropical karst regions.