检索结果-南通市图书馆

Fossil seeds of euryale(Nymphaeaceae) indicate a lake or swamp environment in the late Miocene Zhaotong Basin of southwestern China

引用

Science Bulletin 2015年第20期60卷 1768-1777页

作者： Yongjiang Huang Xueping Ji Tao Su Li Wang Chenglong Deng Wenqi Li Hongfen Luo Zhekun Zhou Key Laboratory for Plant Biodiversity and Biogeography of East Asia Kunming Institute of Botany Chinese Academy of Sciences Yunnan Institute of Cultural Relics and Archaeology and Research Center for Southeast Asian Archeology Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Zhaotong Institute of Cultural Relics Zhaoyang Museum

euryale （Nymphaeaceae） is a monotypic genus distributed in eastern Asia, but fossils in its native distribu- tion are sparse as compared to Europe where the genus has disappeared. Here, we describe a new fossil species, euryale yunnanensis sp. nov., from the late Miocene Zhaotong Basin in southwestern China on the basis of seed remains. Char- acteristics including an ellipsoidal to almost spherical shape, a smooth surface, a germination cap that covers the micro- pyle, the separation of the hilum and germination cap （mi- cropyle）, elliptic testa surface cells with undulate margins and thickened cell walls collectively indicate a close affinity with the genus euryale in Nymphaeaceae. Comparisons of seed morphology and anatomy demonstrate that the newly described fossil species differs from modem and other fossil species of euryale and thus verify the assignment to a new fossil species. As the modem euryale is an aquatic plant, preferably living in swamps and lakes with shallow and stable water, we hypothesize that a lake and/or swamp environment with shallow water was present near Shui- tangba in the Zhaotong Basin, where the Shuitangba homi- noid lived during the late Miocene. This inference is generally consistent with paleoenvironmental data extracted from avian, fish, frog, turtle and crocodile fossils, as well as from aquatic pollen. The fossil history suggests a compara- tively recent （Miocene） emergence of euryale, which is roughly in agreement with the divergence time inferred from the molecular information.

关键词： euryale Nymphaeaceae Aquatic Late Miocene Zhaotong Basin Southwestern China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Flower Characteristics and Pollination Behavior of <i>euryale ferox</i>(Salisb.)

引用

American Journal of Plant Sciences 2018年第4期9卷 722-731页

作者： Bakul Ranjan Jana ICAR-RCER Research Centre on Makhana Darbhanga India

The euryale ferox (Salisb.) or gorgon or makhana is one of the most important non cereal food crops of commerce from wetland ecosystem in India. Flower is cleistogamous (CLS) and predominantly self-pollinated. The variations in floral characters were observed in 10 types of germplasm viz., Manipur-2, Manipur-4, Manipur-7, Manipur-9, Selection-17, Selection-23, Selection-27, Selection-28, Superior Selection-1 and cv. Swarna Vaidehi. In our present study, the number of flowers varied from 8.33 (Manipur-9) to 16.33 (Superior Selection-1) per plant and flowering period was about 40 days. However, peak pollination was observed between 60 - 70 days after transplanting. The weather of August and September were ideal for pollination and fruit set. The temperature and humidity of this period were 29°C - 31°C and 79% - 81%, respectively. Besides cleistogamy (CL), chasmogamy (CH) is also observed after July flowering in euryale, when crop gets matured, water level considerably goes down, and flowers are generally opened in air. There were rare chances for cross pollination by insect. In later stage, chasmogamous (CHS) flower increases up to 22.50% in October. Seed formation of the CHS flower was very less and seed number varies from July (11.25/fruit) to September (28.33/fruit). Artificial hybridization can be performed in CHS flower. The complete flower development was noticed within 72 - 96 hrs from floral initiation. Therefore, getting of CHS flower outside water is very less. There were strong correlations between number of embryos (r = 0.762), ovary area (longitudinal) (r = 0.681) with the yield of the euryale plant.

关键词： euryale Flower Characters Yield and Correlation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：