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首页> 外文期刊>Australian Journal of Crop Science >Biochemical and physiological responses of andiroba (Carapa guianensis Aubl.) seedlings subjected to water deficit
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Biochemical and physiological responses of andiroba (Carapa guianensis Aubl.) seedlings subjected to water deficit

机译：水分亏缺的Andiroba（Carapa guianensis Aubl。）幼苗的生化和生理响应

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摘要

The adaptive mechanisms of native forest species have promoted considerable interests, since knowledge of plant physiology and biochemistry enhances the use of these species in recovery of degraded areas, especially in the Amazon region. This research aimed to evaluate the physiological and biochemical responses of andiroba (Carapa guianensis Aubl.) seedlings submitted to two water regimes. The experiment was conducted in a greenhouse at the Universidade Federal Rural da Amaz?nia in Belém city, State of Pará, Brazil, in the period from September to November of 2013. A completely randomized design with two water conditions was used as follows: control and water deficit, with 15 replications, totaling 30 experimental units. During the experimental period, the control plants were irrigated daily for replacement of evaporated water. The results showed that suspension of irrigation during 25 days of experiment period promoted a considerable reduction of the water potential (?am) of plants grown under water deficit. The stomatal conductance and transpiration rate showed decrease in non-irrigated plants, with the increase of water deficit period. The water deficit induced an increase in the concentrations of sucrose, free proline and glycine-betaine, as well as in total soluble carbohydrates, both in the leaves and in the roots. The water deficit of 25 days of irrigation suspension served in the regulation of water relations of andiroba plants, restricting transpiration rate, reducing the water potential and stomatal conductance, promoting accumulation of free proline, total soluble carbohydrates, sucrose and glycine betaine concentrations.
机译：原生林物种的适应机制引起了极大的兴趣，因为植物生理学和生物化学知识增强了这些物种在退化地区（尤其是亚马逊地区）恢复中的利用。这项研究旨在评估提交到两种水分制度下的Andiroba（Carapa guianensis Aubl。）幼苗的生理和生化响应。该实验于2013年9月至2013年11月在巴西帕拉州贝伦市的马萨诸塞州联邦农村大学的温室中进行。采用两种水条件的完全随机设计如下：和缺水，重复15次，总计30个实验单位。在实验期间，每天灌溉对照植物以替代蒸发的水。结果表明，在试验期间的25天中止灌溉可以显着降低缺水条件下生长的植物的水势（μam）。随着水分亏缺期的增加，非灌溉植物的气孔导度和蒸腾速率降低。缺水导致叶片和根中蔗糖，游离脯氨酸和甘氨酸甜菜碱的浓度以及总可溶性碳水化合物含量增加。 25天灌溉悬浮液的水分亏缺可调节Andiroba植物的水分关系，限制蒸腾速率，降低水势和气孔导度，促进游离脯氨酸，总可溶性碳水化合物，蔗糖和甘氨酸甜菜碱浓度的积累。

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