scholarly journals Fruit set in Styrax obassia (Styracaceae): the effect of light availability, display size, and local floral density

1999 ◽  
Vol 86 (4) ◽  
pp. 495-501 ◽  
Author(s):  
Etsushi Kato ◽  
Tsutom Hiura
Keyword(s):  
Display Size ◽  
Fruit Set ◽  
Light Availability ◽  
Floral Density ◽  
Effect Of Light

scholarly journals Reproductive biology of Duranta repens L. (Verbenaceae) in relation to its environment

2008 ◽  
Vol 14 (3) ◽  
Author(s):  
D. Sharma ◽  
A. Rana ◽  
S. Chauhan ◽  
S. V. S. Chauhan
Keyword(s):  
Reproductive Biology ◽  
Pollen Fertility ◽  
Fruit Set ◽  
Environmental Changes ◽  
Ornamental Plant ◽  
Floral Structure ◽  
Visitation Rates ◽  
Floral Density ◽  
Different Seasons ◽  
Temperature Ranges

Impact of environmental changes (temperature and RH) on reproductive biology in Duranta repens (Verbenaceae) growing at ten different sites of Agra was studied. It flowers throughout the year, with optimum flowering in September. The flowers are arranged in loose clusters on terminal or axillary racemes. They are either blue or lavender in colour, hermaphrodite, actinomorphic and complete. The plants exhibit floral polymorphism (increase and decrease in number of petals and stamens) and considerable variation in extent of pollen fertility, floral density, insect pollinators and fruit-set percentage. The changes in temperature and relative humidity during the entire flowering period, was found associated with the variation in floral structure, pollen fertility and fruit-set percentage. Based on the percentage of fruit-set during different seasons of a year, there were three distinct periods, namely maximum, moderate and minimum periods. The present paper deals with the comparative view of reproductive biology of this ornamental plant in these periods. During the months of August—November when temperature ranges between 13.7-36.6 °C and RH between 79-89% the plant exhibits maximum fruit-set percentage (68-85%). This was associated with maximum flowering, increase in floral size, and increase in visitation rates of pollinators and higher degree of pollen fertility. On the other hand, with temperature reaching to the maximum (15.1-41.5 °C) and reduction in RH (14.1-41.3%), the percentage of fruit-set was reduced to the minimum (21-30%). During this period, number of flowers/plant, floral size, pollen fertility, visitation rates of pollinators were reduced to the minimum. During this period floral polymorphism was also 'recorded.

Effect of light availability on dissolved organic carbon release by Caribbean reef algae and corals

2014 ◽  
Vol 90 (3) ◽  
pp. 875-893 ◽  
Author(s):  
B Mueller ◽  
RM van der Zande ◽  
PJM van Leent ◽  
EH Meesters ◽  
MJA Vermeij ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Light Availability ◽  
Caribbean Reef ◽  
Carbon Release ◽  
Effect Of Light
Sign in / Sign up

Export Citation Format

Share Document