SHOOTS CUTTINGS PROPAGATION OF ENDANGERED AND ENDEMIC TREE SPECIES Kalappia celebica Kosterm USING THE APPLICATION OF ROOTONE

Abstract

Kalappia celebica Kosterm is a member of the Fabaceae family and is included as monotypic species. The tree is one of the most important timber because has a high quality of wood, with dark brown color, making K. celebica has great performance thus increasing its economic value. However, its population has decreased with the increase in logging and wood harvesting, mining, and housing. Natural regeneration is also limited due to infrequent flowering periods and fruiting. Therefore, to improve plant material for replanting, it is crucial to do vegetative propagation, such as cutting and accelerating their rooting and growth using a growth regulator. This study aimed to determine the effect of rootone-f as a plant growth regulator on the rooting and growth of K. celebica cuttings. The study was designed using a randomized block design which consisted of 4 (four) treatments. The treatments used were untreated cuttings (control), application of 100 ppm, 200 ppm, and 300 ppm/rootone-f solution. The data recorded were analyzed using an analysis of variance (ANOVA). The results showed that the application of rootone-f treatments had a significant effect. There is a different response between untreated and treated cuttings. The treatment of rootone f produced better rooting and growth than untreated ones. There was a significant increase in the total of primary and secondary roots, length of roots, shoots number, leaf area, shoots dry weight, and roots dry weight of K. celebica cuttings at eight weeks after planting. The highest rooting and growth were reached by 200-300 ppm treatment. Rootone f application with concentrations of 200 ppm is the optimal dose that could be considered to produce high-quality seedlings of K. celebica from cuttings. The success of shoots cutting propagation for K. celebica will provide primary practice of K. celebica cultivation, support juvenile stage bypass, and contribute to conservation efforts for valuable, endemic, and threatened tree species.

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

“…Salah satu teknik vegetatif yang dapat dilakukan adalah dengan stek. Sampai saat ini, kalapi dapat diperbanyak dengan stek pucuk (Arif et al, 2015), namun informasi perbanyakan secara vegetatif dengan stek akar masih terbatas meskipun telah dilakukan sebelumnya pada jenis tanaman lain.…”

“…Hal ini diduga bahwa dalam jaringan muda juga terbentuk hormon internal yang dapat merangsang pertumbuhan akar. Selaras dengan penelitian tersebut, Arif et al (2015) juga melaporkan bahwa pada perlakuan stek pucuk tanpa pemberian ZPT juga terjadi pembentukan akar. Menurut Supriyanto dan Prakasa (2011) pada jaringan muda berpotensi untuk menghasilkan hormon internal seperti auxin yang dapat merangsang pembentukan jaringan baru.…”

Effect of pre-sowing treatment on the germination and early growth of Kalappia celebica Kosterm.: an endemic and vulnerable tree species of Sulawesi, Indonesia

“…The regulation has directed to examine aspects of the cultivation of K. celebica trees to support conservation efforts and their sustainable use. Several studies on K. celebica have reported on several research aspects, such as ecology and natural distribution (Trethowan et al 2019), mycorrhizal symbiosis (Arif et al 2016;Husna et al 2021), seed handling (Arif et al 2018), and vegetative propagation (Arif et al 2022). Conservation of the species facing a high threat of extinction in nature requires effective and comprehensive efforts to remain sustainable and utilized for human welfare.…”

Diversity of Arbuscular Mycorrhizal Fungi of Kalappia celebica: An endemic and endangered plant species in Sulawesi, Indonesia

“…Kalappia celebica populations and habitats are threatened by habitat degradation for largescale agricultural and plantation expansion, overexploitation, and low natural regeneration. Knowledge of seed handling (Arif et al 2018), vegetative propagation (Arif et al 2022) as well as nursery-scale AMF testing (Husna et al 2019a;2021a) and field-scale (Arif et al 2021) are known. AMF symbiosis related to the endangered K. celebica tree species has been reported by Arif et al (2016).…”