The Success of Root Cuttings is Endangered Kalapi (Kalappia celebica Kosterm.) by Giving Rootone-F Growth Regulator

Kalapi (Kalappia celebica Kosterm.) is endemic in Sulawesi and Endangered species. Plant propagation needs to be done but is constrained by limited seeds. Vegetative propagation of plants can be an alternative method such as using the root cutting technique that has been done previously on other types of species. This study aims to determine the success of vegetative propagation of kalapi (K. celebica), an endangered tree species by root cuttings using Rootone F. as root growth regulator. The research took place from March to June 2019 conducted at the plastic house of the Indonesian Mycorrhizal Association (AMI) Southeast Sulawesi Branch, Kendari. This study used a Randomized Block Design (RBD) consisting of 6 treatments of Rootone-F concentration : (a) 0 ppm, (b) 100 ppm, (c) 200 ppm, (d) 300 ppm, (e) 400 ppm and (f) 500 ppm. Each treatment was repeated three times and three units of the plant so that the total experimental unit used was 54 units. The results showed that the provision of Rootone-F could increase the success of the growth of kalapi root cuttings. Rootone-F concentration of 500 ppm gives the best results on the percentage of cuttings, percentage of sprouts, percentage of roots, number of shoots and shoot dry weight. The results showed that kalapi can be propagated by root cuttings.

Aplikasi Zat Pengatur Tumbuh dengan Jumlah Daun Entres yang Berbeda terhadap Keberhasilan Sambung Pucuk Durian (Application of Plant Growth Regulator with Different Number of Scion Leaves on Success of Durian Top Grafting)

<p>Perbanyakan tanaman secara vegetatif menggunakan teknik sambung pucuk dapat digunakan sebagai alternatif untuk menghasilkan benih yang bermutu. Namun, masalah yang sering terjadi pada sambung pucuk adalah kegagalan sambung. Penelitian ini bertujuan untuk mendapatkan jenis zat pengatur tumbuh, jumlah daun entres, dan kombinasi perlakuan yang memberikan hasil terbaik terhadap keberhasilan sambung pucuk durian. Penelitian dilaksanakan pada bulan November 2018 sampai Januari 2019 di Desa Alasmalang, Kemranjen, Banyumas. Percobaan yang dilakukan merupakan percobaan pot dengan rancangan faktorial. Perlakuan pada penelitian ini adalah kombinasi antara zat pengatur tumbuh (kontrol, ekstrak tauge, air kelapa, IBA, dan BAP) dan jumlah daun entres (2, 4, dan 6 helai). Rancangan penelitian yang digunakan yaitu Rancangan Acak Kelompok Lengkap dengan 15 perlakuan dan diulang tiga kali. Hasil penelitian menunjukkan perlakuan ZPT IBA dan BAP memberikan pengaruh nyata terhadap jumlah tunas sambung pucuk tanaman durian, yaitu sebesar 2,711 dan 2,822 dan perlakuan jumlah daun entres dua helai memberikan pengaruh yang nyata terhadap waktu pecah tunas, jumlah tunas, dan pertambahan jumlah daun sambung pucuk tanaman durian, yaitu sebesar 2,3 helai.</p><p><strong>Keywords</strong></p><p>Sambung pucuk durian; Daun entres; Zat pengatur tumbuh</p><p><strong>Abstract</strong></p><p>Vegetative propagation of plants using shoot grafting can be used as an alternative to produce quality seeds. The problem that often occours in top grafting is the failure to graft. This experiment aims to obtain the type of plant growth regulator, the number of scion’s leaves, and the combination that give the best results for growth of top grafting in durian. The research was conducted in November 2018 to January 2019 in Alasmalang Village, Kemranjen, Banyumas. The experiment was a pot experiment with a factorial design. The treatment was a combination of growth regulator (control, bean extract, coconut water, IBA, and BAP) and number of scion leaves (2, 4, and 6 strands). The research design used was a RCBD with 15 treatments and three replications. The results showed that the treatment of PGR IBA and BAP had a significant effect on the number of grafted shoots of durian plants, namely 2.711 and 2.822 and the treatment of the number of leaves of two leaves had a significant effect on shoot break time, the number of shoots and the increase in the number of grafted leaves of durian plants, namely amounting to 2.3 strands.</p>

Thladiantha dubia Bunge as an invasively dangerous species in Ukraine

The distribution of a potentially invasive species from the Cucurbitaceae family — Thladiantha dubia is considered in Ukraine. The current significant increase in the distribution of the species in many regions of Ukraine has been clarified. It was established that the species was introduced in Uman in 1964. It was found that due to vegetative propagation the species spread beyond the primary introduction site in the botanical nursery of Uman National Univer- sity of Horticulture and around it. The absence of generative reproduction in the analyzed introductory population was established, as there are only male specimens of this dioecious plant. Measures to prevent further spread of Thladiantha dubia are recommended.

ICTV Virus Taxonomy Profile: Solemoviridae 2021

The family Solemoviridae includes viruses with icosahedral particles (26–34 nm in diameter) assembled on T=3 symmetry with a 4–6 kb positive-sense, monopartite, polycistronic RNA genome. Transmission of members of the genera Sobemovirus and Polemovirus occurs via mechanical wounding, vegetative propagation, insect vectors or abiotically through soil; members of the genera Polerovirus and Enamovirus are transmitted by specific aphids. Most solemoviruses have a narrow host range. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Solemoviridae, which is available at ictv.global/report/solemoviridae.

Effects of Phytohormones and Alternative Sources on the Propagation of Ternstroemia cameroonensis Cheek. by Marcotting in the Lebialem Highlands, Cameroon

Marcotting is a method of vegetative propagation which still finds its relevance in the present day forest management and routine practice to produce viable seedlings for the regeneration of Ternstroemia cameroonensis. There is dearth of information regarding the propagation of T. cameroonensis by marcotting. Hence effects of phytohormone application (Indole-3-acetc acid, Indole-3-butyric acid) and alternative sources (coconut water) on the propagation of T. cameroonensis by marcotting were investigated in the Lebialem Highlands. Mortality rates, number of roots, root length as well as marcotts position in the crown was evaluated. The propagation trials were carried under natural environmental conditions. Marcotts had an overall survival percentage of 35.41%. Those established at the middle of the crown had the highest survival percentage (15.27%) followed by those at the lower (11.80 %). Also marcotts established on branches with larger diameter (4-6 cm) and shorter length (50 cm) had the highest survival percentage (20.13 and 19.44 respectively). Again marcotts treated with IBA and CW had the best performance compared to other pre-treatments. According to the result, T. cameroonensis can be amenable through marcotts.

Minicutting technique and IBA application in vegetational propagation of Schinus terebinthifolia Raddi

Vegetative propagation is an alternative for the production of seedlings of native tree species such as Schinus terebinthifolia that presents a high predation rate on its seeds. In order to develop vegetative propagation technology, different concentrations of indolebutyric acid (IBA) were tested in the rooting of apical and intermediate minicuttings of Schinus terebinthifolia. The 2x4 factorial experimental design involved two types of minicuttings (apical and intermediate) and four dosages of the hormone IBA (0, 1000, 2000, and 4000 mg. L-1). The percentages of survival and rooting were evaluated. The intermediate minicuttings (37% and 35%) showed significantly greater survival than the apical cuttings (22% and 9%) respectively at 30 and 60 days, regardless of the IBA concentration. Among the rooting averages at 60 days obtained in the different concentrations of IBA, the treatment of 4000 mg. L-1 generated the highest results (9% for apical and 35% for intermediate). The vegetative propagation by minicuttings of Schinus terebinthifolia demonstrated the viability of intermediate minicuttings with high rooting associated with the highest concentration of IBA.