Results 71 to 80 of about 68,403 (207)

A MICROMORPHOLOGICAL STUDY OF SOME GENERA OF THE PAPILIONOIDEAE SUBFAMILY IN CENTRAL AND NORTHERN IRAQ [PDF]

open access: yesمجلة الأنبار للعلوم الزراعية
This research involved a micro-morphological pollen study on 23 wild plant species belonging to six genera of the Papilionoideae subfamily growing in the central and northern districts of Iraq.
A. H. Abdulmajeed, N. M. Muhammad
doaj   +1 more source

A four stage evolution of the White Channel gravel: Implications for stratigraphy and palaeoclimates [PDF]

open access: yes, 2014
Although the White Channel gravel (WCG) of the Klondike district, Yukon, contains gold placers which have been exploited for over a century, few sedimentological studies have been undertaken.
Chapman, Robert   +3 more
core  

Floral and reproductive biology of Surinam cherry trees with pyrenic and apyrenic fruits [PDF]

open access: yesRevista Brasileira de Fruticultura
: Surinam cherry tree (Eugenia uniflora) is native to Brazil, but it is found in several subtropical countries of Latin America. Its fruit has different berries according to the maturation stage and variety.
Kelli Pirola   +5 more
doaj   +1 more source

A program of corn improvement [PDF]

open access: yes, 1924
Cover ...
Woodworth, Clyde Melvin
core  

Pollen, Tapetum, and Orbicule Development in Colletia paradoxa and Discaria americana (Rhamnaceae)

open access: yesThe Scientific World Journal, 2012
Tapetum, orbicule, and pollen grain ontogeny in Colletia paradoxa and Discaria americana were studied with transmission electron microscopy (TEM). The ultrastructural changes observed during the different stages of development in the tapetal cells and ...
M. Gotelli, B. Galati, D. Medan
doaj   +1 more source

Pollen tube incompatibility reaction on the stigma in selfpollinated Sinapis alba L.

open access: yesActa Societatis Botanicorum Poloniae, 2014
After selfpollination of Sinapis alba L. pollen tubes growth is inhibited on the stigma. The pollen grains germinate 3-4 hours after pollination. The pollen give rise to one or more pollen tubes. They grow along the papillae.
Renata Śnieżko, Krystyna Winiarczyk
doaj   +1 more source

The Genotype of the Endosperm and Embryo as It Influences Vivipary in Maize [PDF]

open access: yes, 1952
The development of the maize seed is dependent on the orderly unfolding of events in which each component of the developing caryopsis has a particular role to play.
Robertson, Donald S.
core   +2 more sources

COLOUR IMAGE IN 2D AND 3D MICROSCOPY FOR THE AUTOMATION OF POLLEN RATE MEASUREMENT

open access: yesImage Analysis and Stereology, 2011
Pollen monitoring is of great importance for the prevention of allergy. As this activity is still largely carried out by humans, there is an increasing interest in the automation of pollen monitoring.
Pierre Bonton   +6 more
doaj   +1 more source

Cytological and Molecular Mechanism of Low Pollen Grain Viability in a Germplasm Line of Double Lotus. [PDF]

open access: yesPlants (Basel), 2023
Liu G   +8 more
europepmc   +1 more source

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