Fruit and Vegetable Week- Ziziphus mauritiana from Panipat
Balkar Arya
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Regards
Dr Balkar Singh
Head, Deptt. of Botany and Biotechnology
Arya P G College, Panipat
Haryana-132103
09416262964
tanay bose
Department of Botany.
University of British Columbia .
3529-6270 University Blvd.
Vancouver, B.C. V6T 1Z4 (Canada)
Phone: 778-323-4036 (Mobile)
Gurcharan Singh
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Dr. Gurcharan Singh
Retired Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297 Mob: 9810359089
http://people.du.ac.in/~singhg45/
Dr. Gurcharan Singh
Retired Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297 Mob: 9810359089
http://people.du.ac.in/~singhg45/
Dinesh Valke
ZIZ-ih-fuss -- an ancient Greek name derived from the Persian word zizafun
maw-rih-tee-AY-nuh -- of or from Mauritiana, a north African area
commonly known as: Chinese apple, Chinese date, cottony jujube, Indian jujube, Indian plum, sour jujube, Yunnan jujube, Yunnan spiny jujube • Hindi: बदर badar, बेर ber, कुबल kubal, फेनिल phenil, पिच्छल picchal • Kashmiri: bari, konkamber, phitni • Konkani: बॉर्र boaarr • Manipuri: boroi • Marathi: बोर bor, सौबरी saubari • Punjabi: amlai, barari, simli, singli • Sanskrit: बदर badar, बद्री badri, सौवीर sauvir • Tamil: எளந்தை elandhai • Telugu: రేగు regu
Native to: south Asia (mainly India)
tanay bose
Department of Botany.
University of British Columbia .
3529-6270 University Blvd.
Vancouver, B.C. V6T 1Z4 (Canada)
Phone: 778-323-4036 (Mobile)
Pankaj Kumar
that in one flower all anthers are pointed upwards where as in other
two the anthers are pointed downwards and backwards.
There are phenomena in plants called HERKOGAMY [Herkogamy is a common
strategy employed by hermaphroditic angiosperms to reduce sexual
interference between male (anthers) and female (stigma) function. ]
and DICHOGAMY [Dichogamy, also known as sequential hermaphrodism, is
the separation in time of gender expression in a hermaphroditic
organism. In the context of the plant sexuality of flowering plants
(angiosperms), there are two forms of dichogamy: protogyny—female
function precedes male function—and protandry—male function precedes
female function.] .
Zizyphus had protoandrous flowers, i.e., androecium develops to
maturity first and after sometime gynoecium attains maturity, in
simple words, there is a distinct delineation of male and female phase
in the same flower as both anther and stigma dont mature at one time
hence inhibiting self pollination.
In the flower above, the anthers mature first (during erect position
as in the picture, which has white pollens on the anthers] but stigma
remains immature, hence the insect will come collect pollens from the
erect anthers but pollens wont be able to get deposited on the stigma
of the same plant because the stigma will not be mature enough to let
the pollen stick to it. Hence if and when the insect will visit
another flower which has mature stigma, pollen gets deposited. In
other words, pollen from one flower is avoided from getting deposited
on the stigma of the same flower.
There are some other terms here which are useful:
Geitonogamy: In this pollination of a flower with the pollen from
another flower on the same flowering plant.
Xenogamy: In this pollination of a flower takes place by pollens from
a different plant .
Read following links for more knowledge:
http://en.wikipedia.org/wiki/Herkogamy
http://en.wikipedia.org/wiki/Dichogamy
Hope I am understandable.
Pankaj
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"TAXONOMISTS GETTING EXTINCT AND SPECIES DATA DEFICIENT !!"
Pankaj Kumar Ph.D. (Orchidaceae)
Research Associate
Greater Kailash Sacred Landscape Project
Department of Habitat Ecology
Wildlife Institute of India
Post Box # 18
Dehradun - 248001, India
