منابع مشابه
Studies on heteromorphic self-incompatibility systems: the cytochemistry and ultrastructure of the tapetum of Primula obconica.
This paper describes the cytochemistry and ultrastructure of the developing tapetum in Primula obconica, a plant with a heteromorphic, sporophytic self-incompatibility system. The tapetum is of the secretory type and cytochemical tests have shown that when it breaks down proteinaceous (esterase) and lipidic components are deposited on the developing pollen grains. Acid phosphatase, a marker of ...
متن کاملGenetic diversity in Primula obconica (Primulaceae) from central and south-west China as revealed by ISSR markers.
Genetic diversity was investigated in 60 individuals of Primula obconica from four natural populations (from Hubei, central China, and Sichuan, south-west China) and from cultivated material. Inter-simple sequence repeat (ISSR) techniques produced 249 polymorphic bands and identified 60 ISSR genotypes. Based on Shannon's index and Nei's genetic diversity, the genetic diversity detected in all n...
متن کاملPopulation Expanding with the Phalanx Model and Lineages Split by Environmental Heterogeneity: A Case Study of Primula obconica in Subtropical China
BACKGROUND Current and historical events have both affected the current distribution patterns and intraspecific divergence of plants. While numerous studies have focused on the Qinghai-Tibetan Plateau (QTP), the impacts of such events on the flora of subtropical China remain poorly understood. Subtropical China is famous for its highly complex topography and the limited impact from glaciation d...
متن کاملFurther Notes on Retrobulbar Neuritis Due to Thallium Poisoning *
In a previous communication9 three examples of an unmistakable syndrome due to thallium intoxication were reported, and the damaging effect of thallium upon the optic nerves was stressed. The therapeutic uses as well as distressing toxic sequellae were reviewed, together with the history of the metal. The disorder is characterized by temporary loss of hair, peripheral neuritis, nervousness, and...
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ژورنال
عنوان ژورنال: Transactions of the Royal Academy of Medicine in Ireland
سال: 1899
ISSN: 0790-2352
DOI: 10.1007/bf03032823