Martynenko Alex, Shotton Katy, Astatkie Tessema, Petrash Gerry, Fowler Christopher, Neily Will, Critchley Alan T
Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3 Canada.
Acadian Seaplants Limited, 30 Brown Ave., Dartmouth, NS B3B 1X8 Canada.
Springerplus. 2016 Aug 22;5(1):1393. doi: 10.1186/s40064-016-3019-2. eCollection 2016.
Previous experiments have demonstrated positive effect of Acadian(®) extract of Ascophyllum nodosum on plant stress-resistance, however the mode of action is not fully understood. The aim of this study was to understand the physiological effect of Acadian(®) seaweed extract on the plant response to drought stress. Leaf temperature and leaf angle were measured as early-stage indicators of plant stress with thermal imaging "in situ" over a 5-day stress-recovery trial. The early stress-response of control became visible on the third day as a rapid wilting of leaves, accompanied with the asymptotic increase of leaf temperature on 4-5 °C to the thermal equilibrium with ambient air temperature. At the same time Acadian(®) treated plants still maintained turgor, accompanied with the linear increase in leaf temperature, which indicated better control of stomatal closure. Re-watering on the fifth day showed better survival of treated plants compared to control. This study demonstrated the ability of Acadian(®) seaweed extract to improve resistance of soybean plants to water stress.
先前的实验已证明，泡叶藻的阿卡迪安（®）提取物对植物抗逆性具有积极作用，但其作用方式尚未完全明确。本研究的目的是了解阿卡迪安（®）海藻提取物对植物干旱胁迫响应的生理影响。在为期5天的胁迫-恢复试验中，通过热成像“原位”测量叶片温度和叶角，作为植物胁迫的早期指标。对照植株的早期胁迫反应在第三天显现为叶片迅速萎蔫，同时叶片温度渐近性升高4-5°C，直至与环境空气温度达到热平衡。与此同时，经阿卡迪安（®）处理的植株仍保持膨压，叶片温度呈线性升高，这表明气孔关闭得到了更好的控制。与对照相比，在第五天重新浇水后，经处理的植株存活率更高。本研究证明了阿卡迪安（®）海藻提取物能够提高大豆植株对水分胁迫的抗性。
