Buletin Kebun Raya

Dynamics of palm collections (Arecaceae) in the Bogor Botanic Garden in periods 1957-2019

2023-11-06T11:11:17+07:00

Bogor Botanical Garden conserves various species of palm species originating from Indonesia and overseas. As one of the flagship collections, the number of genera, species, and specimens fluctuates from time to time. This study aimed to determine the dynamics of palm collections (Arecaceae) in the Bogor Botanical Garden after independence in the period 1957–2019. Data collection was carried out by direct observation of palm collections in the garden, checking collection catalog books and databases, and also reviewing various relevant literature. The results showed that the collection of Arecaceae in the Bogor Botanical Garden from 1957 to 2019 consisted of 129 genera, 554 species, and 3.652 specimens. In the 1957 catalog, there were 91 genera, 271 species, and 870 specimens. In the 2019 catalog, there were 78 genera, 241 species, and 1.009 specimens consisting of 38 genera and 99 species originating from Indonesia, while the number of palm collections originating from other countries was 52 genera and 139 species. In general, the number of genera and species of palm in the Bogor Botanical Garden has decreased by as much as 13 genera and 29 species. Several internal factors, such as old and fallen palms, and also external factors, such as disturbances by pests and diseases. The selection of palm sites suitable for climatic and environmental conditions and intensive maintenance in the Bogor Botanical Garden is essential for optimal growth and reducing the potential death in the garden.

Riparian vegetation diversity of the Banjaran River, Banyumas Regency, Central Java

2023-11-06T09:36:08+07:00

The land use of the Banjaran River continues to change in line with community social changes, which impact land conversion in riparian areas. The study aimed to determine the diversity of riparian vegetation species in the upstream and middle Banjaran Rivers and the relationship of vegetation diversity with environmental factors. The research was conducted in the riparian zone in the upstream part of the Banjaran River (Karangnangka and Kutaliman Villages) and the middle part of the Banjaran River (Kober and Kedungwuluh Villages). Environmental parameters were analyzed using the Kruskal Wallis and the independent test post-hoc test, and the relation between vegetation and environmental factors was analyzed using Canonical Correspondence Analysis. The riparian vegetation of Banjaran River found 61 species Banjaran River riparian vegetation found 61 species (25 species of trees and 40 species of understorey), 57 genera, and 33 families. The vegetation diversity can be seen in diversity index of the tree (1,47-2,36) and understorey (0,52-2,69); richness index of the tree (1,67-3,73) and understorey plants (2,31-4,17); evenness index of the tree (0,75-0,92) and understorey plants (0,22-0,87). Environmental parameter values that show significant differences are dissolved oxygen (DO) and water temperature. Cocos nucifera L. found a lot in low water temperature and soil temperature, contrary to Artocarpus heterophyllus Lam. and Nephelium lappaceum L. found a lot in high water temperature and soil temperature.

The relationship of Taro (Colocasia esculenta (L.) Schott) in Kubu Raya Regency, West Kalimantan based on morphological characters

2023-11-03T15:13:03+07:00

Taro (Colocasia esculenta (L.) Schott) belongs to the Araceae family and has long been cultivated in Indonesia. Taro was widespread and easy to grow anywhere in West Kalimantan. This research aimed to observe the variability and the relationship of taro in Kubu Raya Regency, West Kalimantan Province, based on morphological characters. The research was carried out from September to November 2020. The sampling of 48 samples in 9 subdistricts used a purposive sampling method. Relationship analysis of 44 morphological characters, including 33 qualitative characters and 11 quantitative characters, used the UPGMA method. The results showed that the 48 taro accessions had a similarity coefficient value of 0.49 or 49%, which were divided into 4 clusters. The morphological characterization showed that taro accessions had high phenotypic diversity. The leaves and tubers showed the most varied character.

Shoot induction of siam pontianak orange (Citrus nobilis L. var. microcarpa) cotyledon with additional ambon banana extract and BAP

2023-11-06T10:30:12+07:00

Siam pontianak orange (Citrus nobilis L. var macrocarpa) is a type of siam orange which is one of the leading crop commodities in West Kalimantan. Seedling propagation using tissue culture technology can be enhanced by modifying the growth media through the addition of complex organic compounds such as banana extract. The study aimed to determine the effect of ambon banana extract and BAP on MS media in promoting shoot growth from cotyledon explant. The study used a Complete Randomized Design factorial pattern with two treatment factors. The first factor is ambon banana extract, which has four levels of concentration: 0%, 5%, 10%, and 15%. The second factor is BAP, which has four levels of concentration: 0 mg/l, 1 mg/l, 2 mg/l, and 3 mg/l. The results showed that the addition of a single banana extract, a single BAP, and the combination of banana extract and BAP all significantly influenced the number of leaves. The addition of a single BAP had a significant effect on shoot emergence, the number of buds, the height of the shoots, and the number of roots. The highest number of leaves was observed in the combined treatment of 15% ambon banana extract and 3 mg/l BAP (P3B3), with an average of 11.80 leaves. The fastest shoot emergence occurred at a concentration of 3 mg/l BAP (B3), with an average of 8.75 days, and the highest number of buds was observed at a BAP concentration of 3 mg/l (B3), with an average of 2.95 buds.

Seed germination of Syzygium nervosum DC. from different levels of fruit ripeness

2023-11-03T15:18:37+07:00

Syzygium nervosum DC. is a plant species that has much potential to be utilized, but little is known about seed's germination process. This study aimed to determine germination process of S. nervosum seeds from four stages of fruit maturity. This research was conducted descriptively by observing seed germination process using sand as a medium. The seeds began to germinate on sand seedling media on the third day after sowing (DAS). The germination will continue until second week after the seeds are sown. Eight stages of seed germination were observed: Stage-1 (seed size increases and roots begin to appear 3-4 DAS); Stage-2 (seeds begin to burst and lift as the length of the roots and stems increases, 5-7 DAS); Stage-3 (the seeds rise above surface of the soil and the body parts become more clearly visible and split and the leaf shoots begin to emerge and develop, 8-11 DAS); Stage-4 (leaf buds become increasingly longer until buds are visible, 12-14 DAS); Stage-5 (leaves begin to appear to develop and form the first pair of leaves, (observed at 15-17 DAS); Stage-6 (the first pair of leaves is formed accompanied by the appearance of the second pair of leaves, (18-24 DAS; stage-7 (the first and second pairs of leaves are fully formed and the shoots of the third pair of leaves begin to appear, 25-30 DAS); and stage-8 (the formation of the third pair of leaves until the seedlings are ready to be transplanted, 31-33 DAS). It takes about 56-66 days to germinate.

Cover 26(3), December 2023

2024-03-14T17:29:41+07:00