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Diversity in floral characters of monoecious nutmeg (Myristica fragrans Houtt.)

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Title Diversity in floral characters of monoecious nutmeg (Myristica fragrans Houtt.)
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Creator S Aarthi, J Rema, B Sasikumar, K V Saji & M Anandaraj
 
Subject hermaphrodite flowers, intra floral variability, monoecious, Myristica fragrans Houtt., pollen viability
 
Description Not Available
Floral diversity in monoecious type nutmeg reveals three types of flowers namely; pistillate,
staminate and hermaphrodite flowers. The structure of hermaphrodite flowers in nutmeg is
reported for the first time. The flowers are borne on the leaf axil, flowering habit of the three
types of flowers are seen in cymes as well as solitary in the same tree. The gynoecium consists of
single ovary with bifid stigma in the pistillate flowers and the androecium of staminate flowers
has adnate 7-13 anthers. Intra flower variability is evident in case of hermaphrodite flowers. In
hermaphrodite flower the androecium ranges with 1-4 anthers, in the form of fused filament or
free filament or both; some anthers are fused with the gynoecium. Besides remnants of the stamen
in the developed fruits of hermaphrodite flowers, staminodes are also observed in the flowers.
Colour of all the three types of flowers are light creamy yellow, with thick gamosepalous perianth
which bursts as bilobed, trilobed, tetralobed and pentalobed lobes during anthesis. Analysis of
variance of trees for flower types and floral attributes like flower type, number of anthers, length
of anthers, length of filaments and length of ovary are found to be highly significant. High
coefficient of variation is recorded for hermaphrodite (183.84%) and pistillate (171.71%) flowers.
The pollen viability of the hermaphrodite flowers are found less as compared to the staminate
flowers. The percentage of pollen viability is 79.74 and 90.77 in hermaphrodite and male flower
respectively. In the population studied, the occurrence of hermaphrodite flower in monoecious
tree ranged from 0 - 10%.
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Date 2021-07-29T09:10:48Z
2021-07-29T09:10:48Z
1001-01-01
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/51031
 
Language English
 
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Publisher Not Available