Jatropha curcas L. as a Plant Model for Studies on Vegetative Propagation of Native Forest Plants

Abstract

Even though it is a forest native plant, there are already several studies evaluating the small genome of Jatropha curcas L., which belongs to the Euphorbiaceae family, and may be an excellent representative model for the other plants from the same family. Jatropha curcas L. plant has fast growth, precocity, and great adaptability, facilitating silvicultural studies, allowing important information to be obtained quickly, and reducing labor costs. This information justifies the use of the species as a model plant in studies involving the reproduction of native plants. This study aimed to evaluate the possibility of using Jatropha curcas L. as a model plant for studies involving native forest plants and establish possible recommendations for the vegetative propagation of the species using hardwood cuttings. The information collected can be helpful to other native forest plant species, similar to Jatropha curcas L. To this end, the effects of hardwood cutting length (10, 20, and 30 cm) and the part of the hardwood cuttings (basal, middle, and apex) were evaluated. Moreover, the influence of immersing the hardwood cuttings in solutions containing micronutrients (boron or zinc) or plant regulators (2,4-D, GA3) and a biostimulant composed of kinetin (0.09 g L−1), gibberellic acid (0.05 g L−1), and 4-indole-3-butyric acid (0.05 g L−1). The experiments were carried out in duplicates. In one duplicate, sand was used as the substrate, and rooting evaluations were made 77 days after planting. In another duplicate, a substrate composed of 50% soil, 40% poultry litter, and 10% sand was used, and the evaluations of the saplings were performed 120 days after planting. The GA3 solutions inhibited the roots’ and sprouts’ emissions, while immersion in 2,4-D solution increased the number of primary roots at 77 days after planting. The hardwood cuttings from the basal part of the branch had the best results for producing saplings.

Leaf Culture Technique For High-frequency Regeneration of Non-toxic Variants of Jatropha curcas Plantlets

“…While, using 0.5 or 1.0 IBA on half solidity B5 did not give any percentage of in vitro rooting. The findings are consistent with those of Maharana et al, (2012); Sobrinho et al, (2022) that 0.5 IBA (mg/l) on MS produced a high frequency of root induction after 4-6 weeks. The means ± STDEV (standard deviation) followed by the same letter in each column are not significantly different according to the Dunchan multiple range test (DMRT) at the 0.5 level.…”

“…The oil has a high cetane content and can be used directly in diesel engines, as an extender in diesel fuel, or transesterified into biofuel. The seed or oil cannot be consumed by humans or animals because of the toxins phytates, protease inhibitors, saponins, phorbol esters, and curcin are present (Sobrinho et al, 2022). Some Jatropha accessions from Mexico and Ecuador are edible (Chacuttayapong et al, 2021).…”

Different Responses to Adventitious Rhizogenesis under Indole-3-Butyric Acid and Seaweed Extracts in Ornamental’s Cuttings: First Results in Photinia x fraseri ‘Red Robin’

“…Given the economic importance of the species in the ornamental industry, this research aims to assess the effects of IBA and algae extract-based stimulators on the quality of photinia cuttings, in terms of rooting indicators and ground and aboveground agronomic features. Vegetative propagation by cuttings has numerous advantages, one of which is to provide more uniform and agronomically superior commercial plantlets than those obtained by heterozygous seeds [63]. First results show different responses to adventitious rhizogenesis under in-dole-3-butyric acid and seaweed extract treatments.…”

Exogenous Phytohormones and Fertilizers Enhance Jatropha curcas L. Growth through the Regulation of Physiological, Morphological, and Biochemical Parameters

“…Fruits are produced in winter or throughout the year depending on temperature and soil humidity. The indications show that it originated from South and Central America and some other parts of the tropical and subtropical regions of Africa and Asia [1]. Specifically, it is grown in Benin, Brazil, China, Egypt, Ethiopia, Ghana, Guinea, India, Madagascar, Mali, Mexico, Mozambique, Namibia, Senegal, South Africa, Sudan, Tanzania, Uganda, Zambia, and Zimbabwe [2].…”

“…Its name indicates that it is used as a medicinal plant in the Portuguese in the 16th century, as its name is derived from the Greek word "iatros" which means doctor, and "trophe" which means food [3]. Literature shows that the Portuguese established the plantation of J. curcas for the first time to make soap, lamp oil, and other medicine [1]. However, J. curcas is exotic to Pakistan and introduced in 2007 to Karachi.…”