Tolerance of canola to drought and salinity stresses in terms of root water uptake model parameters
Tolerance of canola to drought and salinity stresses in terms of root water uptake model parameters
复制标题
双低油菜籽根吸水模型参数对干旱和盐胁迫的耐受性
DOI：
10.2478/johh-2013-0009
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
H. Fujimaki
中科院分区：
文献类型：
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作者：
A. Yanagawa;H. Fujimaki
摘要油菜（Brassica napus）作为一种生物燃料作物，被栽培以获取石油。关于其对非生物胁迫的耐受性的定量数据很少。我们评估了油菜对干旱和盐胁迫的耐受性，在宏观根系吸水模型中的参数值。我们进行了一个实验，使用九个柱，每个柱中有两个植物：三个柱处于干旱胁迫下，另外三个柱处于盐胁迫下，其他柱提供潜在的蒸腾作用。两个土壤水分和盐分探针插入到每一个压力下的六列监测含水量和电导率。手动测量柱的重量以获得每日蒸腾。通过将线性插值的基质势和渗透势代入应力响应函数来计算每个深度和时间的吸水量。确定的压力响应函数表明，油菜是更敏感的干旱比麻风树。在蒸腾作用方面，它与麻风树一样耐盐。基质势比渗透势对双低油菜根系吸水的影响更大。
Abstract Canola (Brassica napus) is cultivated for oil as a biofuel crop. Few quantitative data concerning its tolerance to abiotic stresses has been presented. We evaluated the tolerances of canola to drought and salinity stresses in terms of parameter values in a macroscopic root water uptake model. We conducted an experiment using nine columns with two plants in each: three columns were under drought stresses, another three were under saline stress and others provided potential transpiration. Two soil moisture and salinity probes were inserted into each of the six columns under stress to monitor water content and electrical conductivity. Weight of the columns was manually measured to obtain daily transpiration. Water uptake at each depth and time was calculated by substituting linearly interpolated matric and osmotic potentials into the stress response function. Determined stress response functions indicated that canola is more sensitive to drought compared to Jatropha. While, it was found to be as tolerant as Jatropha to salinity stress in terms of transpiration. Matric potential was more determining than osmotic potential to root water uptake of canola.