Cell Division by Furrowing in Magnolia

Nepenthes khasiana Hook.f. is a dioecious insectivorous (carnivorous) plant. The anthers were observed with the SEM. The filaments are connate to form an androphore; the anther heads are sessile in the bud, but as the flower opens the androphore elongates and the bisporangiate anthers are held above the tepals. The archesporial initials comprise of uniseriate rows of cells, the anther wall consists of a very thick endothecium and thin epidermis and the tapetum has a dual in origin, of secretory type. Cytokinesis of microspore mother cell is simultaneous type within a distinct callose wall even after tetrads are formed. Pollen grains are dispersed in tetrads with a sparsely echinate sculpture.

show abstract

“…1 G and H). A similar condition was reported in Magnolia L. (STOUDT 1960;FARR 1998) and in Annona L. (JULIANO 1935).…”

Section: Discussionsupporting

confidence: 79%

Development of the anther in Nepenthes khasianaHook.f. (Nepenthaceae), an endemic and endangered insectivorous plant of North East India

Venugopal¹,

Devi

2003

Feddes Repertorium

View full text Add to dashboard Cite

show abstract

“…It seems noteworthy that these ephemeral cell plates or cell plate precursors have been recorded in two of the most primitive families of flowering plants viz. the vesselless Winteraceae-Pseudowintera axillaris (Sampson 1963) and the Magnoliaceae-Magnolia tripetala (Farr 1918). In another member of the Winteraceae, Zygogynum bailloni, Swamy (1952) recorded the presence at times of an incipient partially deposited cell plate at the end of meiosis I.…”

Section: Discussionmentioning

confidence: 99%

Cytokinesis in Pollen Mother Cells of Angiosperms, with Emphasis on <i>Laurelia novae-zelandiae</i> (Monimiaceae)

Sampson

1969

CYTOLOGIA

View full text Add to dashboard Cite

“…In this genus the cells are shown to be in close contact. Church (1929) reports cytomyxis as not uncommon in the grasses, and that the condition is attended by ejection of chromatin from the nucleus of one microgametocyte to the cytoplasm of the adjacent cell, and hence the species is not so good an illustration of cytomixis according to the definition first propounded by Gates (1908). According to Church (1929) the nucleolus is concerned in cjrtomixis, for Digby (1909) reported ejections of nucleolar material in Galtonia candicans.…”

Section: Microsporogenesis In Salvia Apianamentioning

confidence: 90%