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Palynological studies of pollen grains of some important bee-flora along with pollinators biodiversity and their foraging behaviour

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Title Palynological studies of pollen grains of some important bee-flora along with pollinators biodiversity and their foraging behaviour
 
Creator Singh, Mahendra
 
Contributor Mall, Pramod
 
Subject pollen, palynology, bees, pollination, pollinators, flora, biodiversity, ecosystems, foraging
 
Description Thesis-PhD
The present study was carried out at Govind Ballabh Pant University of Agriculture
and Technology Pantnagar (Uttarakhand), India during 2011-2014. The Palynological studies
of pollen grains, biodiversity of insect pollinators and foraging speed of pollinators was
explored on 48 bee-forage plants, which are belonged to different groups like, Vegetable,
Ornamental flowers, Ornamental trees, Fruit crops, Oilseed crops, Pulses and weed plant. For
Palynological studies the photomicrographs have been taken at different magnifications (like
X500, X650, X2300 X2000 etc.) on Scanning Electron Microscope (JEOL). The foraging
speed (time spent/ flower in seconds) was recorded at different time intervals such as
0600-0800 h, 0800-1000 h, 1000-1200 h and1600-1800 h for 7 days was recorded. The
pollination efficiency index of different insect pollinators was studied on Cucumis sativus crop.
It has been found that the common shape of pollen is spherical. It was also observed
that almost all the pollen grains from a family were similar in morphological descriptions.
The morphology structures of different pollen grains were entirely different. The exine surface of
pollen grains was observed with pointed spines, smooth, thick, thread like and hexagonal
structure
The hymenopterans were the major floral visitors of belonging 5 families viz. Apidae,
Anthophoridae, Megachilidae, Halictidae and Andrenidae They were followed in order of
diversity by Dipterans 2 families viz. Syrphidae and Muscidae. The study revealed that the
maximum time spent by insect pollinators during 0800-1000h and lowest during and1600-
1800h. Apis species was common almost all the bee forage plants except Mango crop. In
Mango crop Syrphus spp. and Musca spp. were very common. For pollination efficiency of
different pollinators on Cucumis sativus the pollination index was maximum (512565.7) in
Apis mellifera, followed by Apis dorsata (428160.2) and Apis cerana (320718.5), and lowest
pollination index (074232.9) was found in Xylocopa verticalis.
This study is to provide the reference information on nectar and pollen source for
honeybees and to evaluate the morphological difference in pollen grains of selected bee flora
and it is clearly revealed that the role of honey bees as an efficient pollinator in cross
pollinated crops emphasis that we must conserve them in an eco-friendly manner.
 
Date 2016-06-08T12:22:15Z
2016-06-08T12:22:15Z
2015-01
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67002
 
Format application/pdf
 
Publisher G.B. Pant University of Agriculture and Technology, Pantnagar-263145 (Uttarakhand)