Effect of <Emphasis Type="Italic">Azotobacter chroococcum</Emphasis> on <Emphasis Type="Italic">in vitro</Emphasis> pineapple plants’ growth during acclimatization |
| |
Authors: | Rayza González Taletha Laudat Mayda Arzola Roberto Méndez Pedro Marrero Lázaro E Pulido Bernardo Dibut José Carlos Lorenzo |
| |
Institution: | 1.Centro de Bioplantas,Universidad de Ciego de ávila,Ciego de ávila,Cuba;2.Facultad de Ciencias Agropecuarias,Universidad de Ciego de ávila,Ciego de ávila,Cuba;3.Instituto Nacional de Investigaciones Fundamentales de la Agricultura Tropical (INIFAT),Ciudad de La Habana,Cuba |
| |
Abstract: | Pineapple is one of the most important tropical fruits, but the availability of planting material is insufficient to agricultural
demands. Therefore, several pineapple micropropagation protocols have been developed. However, acclimatization of in vitro plants continues to take a prolonged period. Biofertilizers have been found as safe alternatives to improve the agricultural
performances of many crops. This study highlights some of the effects of the application of Azotobacter chroococcum (INIFAT5 strain) on in vitro pineapple plants during acclimatization. The bacteria were sprayed immediately after transplanting to the ex vitro environment; the plants were then sprayed every 4 wk. A control group of plants was established. Subsequently, after 5 mo,
the evaluated variables included fresh and dry plant weight, plant height (cm), and root length (cm). The anatomy of middle-aged
leaves and roots was also studied: transversal thickness and width of cuticle, epidermis, hypodermis, aquiferous parenchyma,
and photosynthetic parenchyma. Thickness of root exoderm, external cortex, internal cortex, and stele were also evaluated.
In general, the INIFAT5 strain improved the plant development. Results showed that the bacteria significantly provoked changes
in the plant fresh weight, the thickness of the leaf abaxial and adaxial cuticles, and the root exoderm width. Contrastingly,
A. chroococcum did not affect the thickness of the leaf photosynthetic parenchyma. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|