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Journal of Tropical Crop Science

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Published by Institut Pertanian Bogor

ISSN : 23560169 EISSN : 23560177 DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Journal of Tropical Crop Science is an international journal publishing research related to tropical crops. Articles in the journal focus on in-vivo and in-vitro production and production environment, breeding, seed technology, physiology, postharvest, pest and pathology of cereals, vegetables, fruits, ornamentals, medicinal and plantation crops; soil, landscape, turf and agro ecology management under tropical conditions.

Arjuna Subject : -

Articles 298 Documents

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Adaptation of Wetland Rice to Extreme Weather Dulbari, Dulbari; Santosa, Edi; Sulistyono, Eko; Koesmaryono, Yonny
Journal of Tropical Crop Science Vol 4 No 2 (2017): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Climate change is believed to increase the intensity and the frequency of extreme weather events in reference to strong winds and heavy precipitations. The extreme event is defined as strong wind at speed of 50 km.h-1 and rain fall intensity 10 to 20 mm.h-1 or more . This condition is detrimental to rice production as this may lead to lodging and flooding which normally occurs during the grain filling stage to harvesting resulting in lower yield and grain quality. The. Simultaneous extreme events and critical rice growth occured more frequently due to increasing cropping season within a year in Indonesia. Therefore, it is important to mitigate and develop adaptation strategies in order to sustain rice production. Efforts to adapt to these extreme environmental conditions are mostly based on genetics and agro ecological approaches. Genetically, rice with strong hills, high aerodynamic with low water retention is desired. Agro-ecological manipulation is conducted through wind break application, planting arrangement to facilitate better sunshine penetration, to manage water level and planting calendar. Availability of weather station in the field is important to improve mitigation and continuous adaptation strategy against extreme weather events. Keywords: plant canopy architecture, climate change, heavy rainfall, lodging, strong wind

Cloning and Characterization of Partial Chlorophyll a Oxygenase (CAO) Gene Involved in Soybean Shade Tolerance Mechanism Khumaida, Nurul; Kisman, Kisman; Sopandie, Didy
Journal of Tropical Crop Science Vol 2 No 2 (2015): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Plant tolerance mechanism under shade stress is indicated by high chlorophyll-b content, which is synthesized from chlorophyll a by chlorophyll a-oxygenase (CAO) gene. The study was aimed to clone and characterize the partial of CAO gene involved in shade tolerance mechanism in soybean. Total RNA was isolated from the second trifoliate leaves of soybean plants and the first strand cDNA was prepared using Reverse Transcriptase Moloney Murine Leukemia Virus (RT-M-MLV) (RNase H-). Northern blot hybridization was used to analyze expression of partial CAO gene. The result showed that one partial gene, CAO 3-4 (1,052 bp), comprised of 292 adenine (a), 241 cytosine (c), 276 guanine (g) and 242 thymine (t), therefore the number of amino acid deduction was 338. The expression of CAO 3-4 partial gene was higher in shade tolerant genotypes than in shade sensitive genotypes, both under 50% shade and dark. These results demonstrated that the CAO gene is involved in shade tolerance mechanism of soybean.

Controlling Poinsettia (Euphorbia pulcherrima Will.) Height with Growth Retardant Application in West Java, Indonesia Sukma, Dewi; Megawati, Gina
Journal of Tropical Crop Science Vol 3 No 3 (2016): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

A study was conducted to evaluate the effects of the growth retardant Cycocel application in the growth and development of poinsettia (Euphorbia pulcherrima) ‘Freedom Red’. Cycocel was applied by spraying plant shoots at the concentrations of 1000, 1500, 2000, 2500 ppm. The increase in cycocel concentrations reduced plant height, leaf size, internodal length, plant spread and the number of flowering plants. All cycocel concentrations resulted in an ideal potted plant height. The optimum spray concentration of Cycocel used to obtain compact and uniformly flowering plants under tropical West Java environment was 1000 ppm.

Reproductive success and compatibility among accessions of Jatropha curcas in Indonesia Palupi, Endah R.; Ahmad, Ade S.; Affandi, Rofiq; Qadir, Abdul; Randriani, Eni
Journal of Tropical Crop Science Vol 1 No 2 (2014): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Large scale exploitation of Jatropha curcas for biofuelproduction is restrained by low productivity henceeconomically not protable. One of the main constraintsis due to limited number of female owers in aninorescence which eventually develop into fruits thatbear seed. Investigation on oral biology andreproductive potential of the species had been carriedout, but seems to vary among sites. The research wasconducted to study reproductive success and thecompatibility among Indonesian Jatropha accessions.The research was set up in two experiments. The rstexperiment was conducted at the Jatropha seedorchard, Pakuwon, Sukabumi, West Java from April toJuly 2007 using four-year- old trees of accessions fromLampung, Banten, West Java, and Central Java. Thesecond experiment was conducted at LeuwikopoExperimental Station of Bogor Agricultural Universityfrom April to July 2008 using one-year-old trees ofaccessions from Lampung, Bengkulu, Palembang, andKediri. Flowers were obtained from controlled self andcross-pollinated as well as left for open-pollination. Theresult showed that reproductive success varied amongaccessions; the greatest success was 0.73 obtainedfrom aWest Java accession and the least was 0.53 fromBanten accession. The Jatropha accessions werecategorized as partially self-incompatible as indicatedby index of self-incompatibility (ISI) that ranged 0.93-0.99. Banten accession produced highly viable andvigorous seeds regardless of pollination methods;accessions of Central Java produced higher viabilityseeds when cross-pollinated within accession, whereasthose from West Java and Lampung produced higherviability seeds when self-pollinated.Keywords: accessions, Jatropha curcas, selfpollination,self-incompatibility, seedviability

Conservation Status of Lontar Palm Trees (Borassus flabellifer Linn) In Jeneponto District, South Sulawesi, Indonesia Sirajuddin, Sukamaluddin; Mulyadi, Mulyadi; Dirawan, Gufran D.; Amir, Faizal; Pertiwi, Nurlita
Journal of Tropical Crop Science Vol 3 No 1 (2016): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

This study aimed to describe the botanical description, conservation status and potentials of Sulawesi native lontar palm trees (Barassus flabellifer Linn) in Jeneponto district, South Sulawesi, Indonesia. This study was extended to include a study on the community’s attitude towards preservation of lontar palm trees involving 30 people distributed over three research sites. Overall 53% of the dry-land in Jeneponto district is grown by lontar palm trees with the tree density ranging from 50 trees per ha for trees aged between 1-5 years; 37 trees per ha for trees aged between 5-10 years; and 32 trees per ha for trees aged more than 10 years. New lontar palm trees which are being managed by the local communities are planted on 27% of the land area. Tamalatea sub- district has the largest lontar palm tree population in Jeneponto District.

Heliconia Society Cultivar Registration Skinner, Dave; Hintze, Jan; Brunner, Bryan
Journal of Tropical Crop Science Vol 1 No 1 (2014): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

The Heliconia Society International (HSI, website: www.heliconia.org) is a non-prot corporation formed in 1985 because of rapidly developing interest around the world in these plants and their close relatives.The purpose of HSI is to increase the enjoyment and understanding of Heliconia and related plants (in the families Cannaceae, Costaceae, Lowiaceae, Marantaceae, Strelitziaceae, and Zingiberaceae) of the order Zingiberales through education, research and communication. Interest in Zingiberales and information on the cultivation and botany of these plants is rapidly increasing. HSI will centralize this information and distribute it to members.

Guano and Rice-Hull Ash Application for Flowering Induction on Orange Jessamine (Murraya paniculata (L.) Jack) Eliazar, Tabitha Trianda; Aziz, Sandra A.
Journal of Tropical Crop Science Vol 2 No 3 (2015): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Orange jessamine (Murraya paniculata (L.) Jack) has high economical values due to its medicinal properties. Orange jessamine leaves contain flavonoid, mexotionin and coumarin. Orange jessamine flowers contain scopoletin that can lower blood pressure and can be used as an anti-inflammatory agent and as anti-allergic. Orange jessamine is often used as an ornamental plant because it has beautiful flowers similar to jasmine, has nice scent, and red color fruits. The aim of this research is to study the effects of guano and rice-hull ash application on flowering induction of orange jessamine. The research was conducted at an organic experimental farm, Bogor Agricultural University, Darmaga (6°30' – 6°45' S, 106°30'-106°45' E) from December 2014 to June 2015 using randomized complete block design. The experiment used four treatments, i.e. guano at 0.4 kg per plant, combination of guano (0.4 kg per plant) and rice-hull ash (3.0 kg per plant), rice-hull ash 3.0 kg per plant and without fertilisation as control. The results showed that the application of rice-hull ash increased plant height and leaf number. Guano application significantly increased the intensity of leaf color in mature orange jessamine leaves. Rice-hull ash application increased flower number at 12 and 20 weeks after application.Keywords: chlorophyll, flower number, flower weight, NPK value, organic farming

Optimation of In vitro Lateral Shoots Multiplication of Papaya (Carica papaya L.) “Callina” with BAP and NAA Efendi, Darda; Putra, Mirza R
Journal of Tropical Crop Science Vol 4 No 3 (2017): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Papaya is a popular fruit and is grown commercially in many subtropical and tropical countries. Papayas are generally grown from seeds; therefore the offsprings are not true-to-type and could come in three sexes, female, male, and hermaphrodite. Clonal propagation is required to obtain to grow true-to-type hermaphrodite papayas. In this research, we developed an in vitro protocol for shoot multiplication from lateral shoots from in vitro germinated papaya seedlings. The in vitro propagated plant materials could potentially be used as a source of papaya micro cuttings, or as scion for papaya grafting. The experiment was set up as a factorial experiment with NAA at 0, 0.1 and 0.5 mg.L-1, and BAP at 0, 0.1, 0.5, and 1.0 mg.L-1 in a completely randomized block design. BAP interacted with NAA in affecting the shoot production per explant. The optimum BAP and NAA concentration to produce lateral shoots was 0.54 mg. L-1 and 0.1 mg.L-1, respectively. Media without NAA reduced the number of lateral shoots and number of leaf per explant at any BAP concentration.Keywords: hermaphrodite, seeds, true to type, clonal propagation, micro cuttings.

Growth and Development of Potted Ornamental Chilli (Capsicum annuum L.) with Different Types of Fertilizer and Growing Media Putra, Bagas Akmala; Suketi, Ketty; Syukur, Muhamad
Journal of Tropical Crop Science Vol 4 No 2 (2017): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Chilli has great potential to be marketed as ornamental potted plants due to their diversity in colours and shape of the fruits. The purpose of this research was to determine the optimum growing media and types of fertilizer to improve the performance of three varieties of potted ornamental chilli, ”Syakira”, “Lembayung”, and “Ayesha”. This research was conducted in Cikabayan greenhouse, Bogor Agricultural University, from December 2016 until May 2017. The experiment was arranged in a split plot design with fertilizer as the main factor (without fertilizer, P0; AB mix; P1, and NPK + Gandasil D, P2) and growing media as sub plots, i.e. charcoal husk : soil : manure (M1), perlite: soil : manure (M1), and cocopeat : soil: manure (M3) with proportion of 2:1:1 (v/v). NPK fertilizer and foliar fertilizer Gandasil D showed the maximum plant height, number of branches, number of flowers and fruits. “Ayesha” treated with AB mix fertilizer had the largest fruit diameter whereas “Syakira” and “Ayesha” had the longest fruit under the same treatment. Ornamental chilli grown on charcoal husk and cocopeat had the maximum number of branches and flowers per plant. “Syakira” grown on charcoal husk with AB mix and NPK + Gandasil D, “Lembayung” using cocopeat with AB mix fertilizer, and “Ayesha” varieties using charcoal husk with AB mix fertilizer were the most preferred by the consumers.

The Growth of Mangroves in Created Wetland in the Porong River, East Java, Indonesia Hamzah, Faisal; Widakti, Nuryani; Sidik, Frida
Journal of Tropical Crop Science Vol 2 No 1 (2015): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Mangrove plantation projects have been established in the created mangrove wetland in the mouth of the Porong River, East Java, in parallel with the construction of reclamation area for LUSI mud dumping area. This study was aimed to assess the growth of planted mangrove in a created mangrove wetland in relation to the environmental parameters, which are sediment salinity, sediment fraction, pore water salinity, pH/eH, and total organic matter (TOM) in the sediment. Periodical measurement of mangrove growth Avicennia sp. and the environmental parameters were undertaken in the created wetland and in the mud flats of intact mangrove forest nearby the created wetland as the natural reference in July to November 2012. We found that sediments in the created wetland had different characteristics of sediment fractions, sediment salinity and TOM compared to sediments in the mud flats of intact forests. Sand dominated sediments with low TOM and higher water salinity in the created wetland as compared to those in the mud flats affected growth rate of mangroves in study sites. We suggest that TOM and salinity are important factors that contribute to the growth of mangroves in the Porong River. Keywords: Mangrove, salinity, Porong River, total organic matter.

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Lianah lianah

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Lianah lianah

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Journal Mail Official
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Kota bogor,

Jawa barat

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