Department of Agriculture, Federal University of Lavras, P.O. Box 3037, Zip Code 37200-900, Lavras, MG, Brazil.
Department of Agriculture, Federal University of Lavras, P.O. Box 3037, Zip Code 37200-900, Lavras, MG, Brazil.
Microbiol Res. 2021 Jul;248:126750. doi: 10.1016/j.micres.2021.126750. Epub 2021 Mar 18.
The association of different species of endophytic bacteria with the rhizosphere of the host plants can stimulate growth, development and acclimatization, offering a greater quantity of seedlings, in addition to reducing the cycle, providing economic return to the producer. The objective of this study was to evaluate the effect of introduction four bacterial isolates through inoculation into the root system in three banana cultivars (Prata Anã, Grande Naine and BRS Princesa) in the acclimatization phase. The evaluated treatments were: control (nutrient broth without bacteria); Bacillus cereus strain 1 (BC1); Bacillus cereus strain 2 (BC2); Bacillus thuringiensis (BT); Buttiauxella agrestis (BA). The morphological characteristics related to the development of the plants (total height and pseudostem diameter) were evaluated throughout the acclimatization period. After 90 days of transplanting and acclimatization, root length, leaf number, dry root weight, pseudostem and leaf, leaf area, internal carbon concentration, stomatal conductance, photosynthesis rate, transpiration rate, leaf temperature and chlorophyll were evaluated. The bacteria showed different results in relation to the studied cultivars. Considering the morphological and physiological characteristics observed in this study, B. thuringiensis for the cultivars Prata Anã and Grande Naine and the B. agrestis for the cultivar BRS Princesa are recommended for the process of acclimatization of banana seedlings, as they stimulated growth of the plant, increasing the dry mass, besides promoting the growth of roots. In this way, they improved the physiological aspects of the plants and reduced the period of acclimatization of the banana.
内生细菌的不同种与宿主植物根际的关联可以刺激生长、发育和适应，提供更多的幼苗，同时减少周期，为生产者提供经济回报。本研究的目的是评估通过根系接种引入四种细菌分离株对三个香蕉品种（Prata Anã、Grande Naine 和 BRS Princesa）在适应阶段的影响。评估的处理方法如下：对照（不含细菌的营养肉汤）；芽孢杆菌 1 株（BC1）；芽孢杆菌 2 株（BC2）；苏云金芽孢杆菌（BT）；草生芽孢杆菌（BA）。在适应期内，评估与植物发育相关的形态特征（总高度和假茎直径）。移栽和适应 90 天后，评估根长、叶数、干根重、假茎和叶、叶面积、内部碳浓度、气孔导度、光合速率、蒸腾速率、叶片温度和叶绿素。细菌对不同的品种表现出不同的结果。考虑到本研究中观察到的形态和生理特征，建议在 Prata Anã 和 Grande Naine 品种中使用苏云金芽孢杆菌，在 BRS Princesa 品种中使用草生芽孢杆菌，用于香蕉幼苗的适应过程，因为它们刺激了植物的生长，增加了干物质，同时促进了根系的生长。这样，它们改善了植物的生理方面，并缩短了香蕉的适应期。
