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Rooting of Stem Cuttings of <i>Jatropha platyphylla</i>(Euphorbiaceae) in the Obtaining of Axillary buds for Grafting

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American Journal of Plant Sciences 2021年第12期12卷 1880-1893页

作者： Edith Salazar-Villa Miguel Angel Angulo-Escalante Jesús Diego Castro-Valenzuela karla marina báez-parra Lluvia de Abril Alexandra Soriano-Melgar Federico Soto-Landeros Centro de Investigación en Alimentación y Desarrollo A.C. Culiacán México Universidad Autónoma de Occidente Guasave México Facultad de Ciencias Químico biológicas Universidad Autónoma de Sinaloa Culiacán México Centro de Investigación en Química Aplicada Saltillo México Instituto Tecnológico Superior de Guasave Guasave México

Jatropha platyphylla is considered as a potential source of edible protein, oil, and phenolic compounds with anti-inflammatory activity. The use of stem cutting in vegetative propagation and grafting is as indispensable tools for mass multiplication of superior genotypes and helps in improve planting yield and quality. The study was aimed to investigate the effect of different diameters (10 - 15, 16 - 25 and 26 - 35 mm) and different hormone concentrations of indo-butyric acid (0, 1.5, 3, 6 and 10 g/L), in the rooting of Jatropha platyphylla and to obtain axillary buds to performed grafts. Rooting efficiency was 80% in greenhouse conditions. Hormone concentration and diameter significantly affected the rooting and shooting ability of Jatropha platyphylla stem cuttings. Stem cuttings of 26 - 35 mm have the greatest number, length and dry root weight. 76% survival of the grafted plants was obtained. This demonstrates the necessity to improve the conventional propagation methods with appropriate scientific inputs for more economical and time efficient techniques for standard propagation protocols.

关键词： Axillary buds Graft Stem Cutting Plant breeding Varietal Selection

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Morphological Characterization and Phenological Modeling of <i>Jatropha platyphylla</i>(Euphorbiaceae) Muell. Arg. Genotypes

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American Journal of Plant Sciences 2022年第1期13卷 23-35页

作者： Edith Salazar-Villa Martha Lidia Gutiérrez-Pérez Federico Soto-Landeros karla marina báez-parra María de la Paz Sosa-Segura Miguel Angel Angulo-Escalante Centro de Investigación en Alimentación y Desarrollo AC Culiacán México Facultad de Agronomía Universidad Autónoma de Sinaloa Culiacán México Instituto Tecnológico Superior de Guasave Guasave México Facultad de Ciencias Químico biológicas Universidad Autónoma de Sinaloa Culiacán México Colegio de bachilleres del Estado de Sinaloa Culiacán México

Morphological characterization and phenological modeling were carried out on genotypes of Jatropha platyphylla collected from the states of Sinaloa and Durango, Mexico. The morphological characterization evidenced the existence of monoecious plants, finding individuals with male and female flowers in the same inflorescence. Fruit with four seeds was also found. The phenological study was divided into two phases and calculated in thermal requirement (°D): Vegetative [seedtime (0), germination (24), emergence (98), cotyledons (87), second (302) and fourth (524) true leaves, end of vegetative growth (302)] and reproductive [flowering (303), fructification (342), maturation (126), defoliation and senescence (450)]. The thermal constant (2558) was similar in all eight genotypes. The phenological stages and the accumulated degree days were adjusted with a third-degree polynomial (Stage = -0.0041x3 + 0.7446x2 - 8.6808x + 6.2448) (R2 = 0.99%) stage. The development of phenological models facilitates the prediction of the flowering date for the selection of varieties with high oil and protein content.

关键词： Degree-Days Monoecious Phenological Modeling Plant breeding Varietal Selection

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