Mangrove Management Rhizophora mucronata Lamk. in Mangunharjo, Semarang City Based on Pollen Quality

Abstract

Rhizophora mucronata is a type of mangrove that plays an important role in coastal life. Reproductivity of R. mucronata is influenced by environmental factors. This study aims to examine the effect of environmental conditions on pollen quality in terms of viability and germination. The sampling method used was purposive sampling from three stations and two different flowering phases (pre-anthesis and anthesis). Pollen quality was carried out by staining test using acetocarmine dye and germination test using Brewbaker and Kwack (BK) media. The data were then analyzed using analysis of variance. Based on differences in sampling stations, the highest pollen viability was recorded at Station II (91.25%), and the highest was in the preanthesis flowering phase (92.88%). The highest pollen germination was recorded at Station III (95.36%), and the lowest was in the pre-anthesis phase from Station I (87.41%). The results showed that the three different location two different flowering phase were still suitable for the growth of R. mucronata mangroves.