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植物多样性（英文）
植物多样性（英文）

李德铢

双月刊

2096-2703

bianji@mail.kib.ac.cn

0871-65223032

650204

昆明市盘龙区蓝黑路132号中科院昆明植物研究所内

植物多样性（英文）/Journal Plant DiversityCSCD北大核心CSTPCDSCI
查看更多>>本刊是国家科委(79)国科发条字341号文批准创办的植物学专业学报，是中国科学院主管的全国性自然科学期刊。本刊1979年创刊，现已成为我国植物科学研究发表论文的主要学术性刊物之一。本刊属于中国生物学类科技核心期刊；中国自然科学核心期刊。主要刊登植物学各学科具有创新性或较高学术水平的原始论文和简报；植物学领域的新发现及重大应用价值的新成果快报；结合本人工作，反映本学科重要领域的国内外最新研究进展的综述等。本刊设有植物系统学与生物地理学、植物化学与化学生物学、生物多样性保护与民族植物学、植物生态学与资源管理、植物生理与分子生物学5个专栏。本刊已被国内外多家二次文献收录，现我刊已同30个国家和地区有发行和交换关系。
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    Elevational and temporal patterns of pollination success in distylous and homostylous buckwheats(Fagopyrum)in the Hengduan Mountains

    Ling-Yun WuShuang-Quan HuangZe-Yu Tong
    661-670页
    查看更多>>摘要：Reproductive strategies of sexually dimorphic plants vary in response to the environment.Here,we ask whether the sexual systems of Fagopyrum species(i.e.,selfing homostylous and out-crossing distylous)represent distinct adaptive strategies to increase reproductive success in changing alpine environments.To answer this question,we determined how spatial and temporal factors(e.g.,elevation and peak flowering time)affect reproductive success(i.e.,stigmatic pollen load)in nine wild Fagopyrum species(seven distylous and two homostylous)among 28 populations along an elevation gradient of 1299-3315 m in the Hengduan Mountains,southwestern China.We also observed pollinators and conducted hundreds of hand pollinations to investigate inter/intra-morph compatibility,self-compatibility and pollen limitation in four Fagopyrum species(two distylous and two homostylous).We found that Fag-opyrum species at higher elevation generally had bigger flowers and more stigmatic pollen loads;late-flowering individuals had smaller flowers and lower pollen deposition.Stigmatic pollen deposition was more variable in distylous species than in homostylous species.Although seed set was not pollen-limited in all species,we found that fruit set was much lower in distylous species,which rely on frequent pollinator visits,than in homostylous species capable of autonomous self-pollination.Our findings that pollination success increases at high elevations and decreases during the flowering season suggest that distylous and homostylous species have spatially and temporally distinct reproductive strategies related to environment-dependent pollinator activity.
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    Seedling dynamics differ between canopy species and understory species in a tropical seasonal rainforest,SW China

    Libing PanXiaoyang SongWenfu ZhangJie Yang...
    671-677页
    查看更多>>摘要：We used 11 years of census data from 450 seedling quadrats established in a 20-ha forest dynamics plot to study seedling dynamics in tree species of a tropical seasonal rainforest in Xishuangbanna,south-western China.We found that overall seedling recruitment rate and relative growth rate were higher in the rainy season than in the dry season.Both the recruitment rate of seedlings from canopy tree species(two species)and the relative growth rate of seedlings from understory species(nine species)were higher in the rainy season than in the dry season.However,in the rainy season,the recruitment rate of seedlings was higher for canopy tree species than for understory tree species.In addition,relative growth rate of seedlings was higher in the canopy species than in understory seedlings in the dry season.We also observed that,in both rainy and dry seasons,mortality rate of seedlings was higher for canopy species than for understory species.Overall,canopy tree species appear to have evolved a flexible strategy to adapt to the seasonal changes of a monsoon climate.In contrast,understory tree species seem to have adopted a conservative strategy.Specifically,these species mainly release seedlings in the rainy season and maintain relatively stable populations with a lower mortality rate and recruitment rate in both dry and rainy seasons.Our study suggests that canopy and understory seedling populations growing in forest understory may respond to future climate change scenarios with distinct regeneration strategies.
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    A new gnetalean macrofossil from the Lower Cretaceous of the Laiyang Basin,eastern China

    Peihong JinMingzhen ZhangBaoxia DuJing Zhang...
    678-682页
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