Effects of Zeolite and Selenium Application on Some Physiological Traits and Oil Yield of Medicinal Pumpkin (Cucurbita pepo L.) under Drought Stress
Effects of Zeolite and Selenium Application on Some Physiological Traits and Oil Yield of Medicinal Pumpkin (Cucurbita pepo L.) under Drought Stress
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发表时间：
2012
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通讯作者：
K. E. Zanjani;Amir Hossein;S. Rad;M. Naeemi;T. Taherkhani
中科院分区：
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作者：
K. E. Zanjani;Amir Hossein;S. Rad;M. Naeemi;T. Taherkhani
毫无疑问，某些植物具有宝贵的药用价值。但当地社区在收获和种植这些植物时面临许多挑战。药用南瓜（Cucurbita pepo L.）变种苏合香）是一种经济上重要的药用植物，种植用于油料生产。水资源短缺是世界农业面临的重要问题之一。天然沸石具有吸水、排水、抑制硝酸盐淋溶等特性，可用于土壤改良。研究了沸石和硒对药用南瓜（Cucurbita pepo L.）在干旱胁迫下。田间试验采用完全随机区组设计，重复三次。这些因素包括：灌溉（对照，在开花期施加干旱胁迫和在果实形成期间施加干旱胁迫）、沸石（不施用和施用10吨/公顷）和硒（不施用和30 g/L）来自硒酸钠。干旱胁迫和沸石施用对各生理指标均有影响。干旱胁迫降低了叶片总叶绿素含量、气孔导度、相对含水量、叶片可溶性蛋白、含油量和含油量，施用沸石处理提高了除含油量外的其他性状。在干旱胁迫条件下，沸石的存在降低了脯氨酸积累，WSD和CAT抗氧化酶活性比对照。在干旱条件下，施硒和沸石能提高油菜的相对含水量、CAT抗氧化酶活性和油菜产量。果实形成期干旱胁迫降低油分含量和油产量的程度大于开花期。在干旱胁迫条件下，施用沸石和硒对提高旱地油菜的生理性状和产量，防止油菜减产有一定的作用。
There is no doubt that certain plants offer valuable medicinal properties. But there are many challenges that local communities face in the harvesting and cultivation of these plants. Medicinal pumpkin (Cucurbita pepo L. var. Styriaca) is an economically important medicinal plant cultivated for oil production. Water source limitation is one of the important problems in agriculture worldwide. Natural zeolits have some properties such as water absorption and emission and nitrate leaching inhibition, which is useful for soil amendment. This study was carried out to investigate the effects of zeolite and selenium application on some physiological traits and oil yield of medicinal pumpkin (Cucurbita pepo L.) under drought stress. A field experiment was carried out in a factorial based on a randomized complete block design with three replications. The factors included: Irrigation (control, drought stress imposed during at flowering phase and drought stress imposed during fruit formation), Zeolite (non-application and application of 10 ton/ha) and Selenium (non- application and 30 g/Lit) from sodium selenate. All physiological parameters were affected by drought stress and zeolite application. Drought stress decreased total chlorophyll content, stomatal conductance, RWC, leaf soluble protein, oil content and oil yield and zeolite application in drought stress increased mentioned traits except oil content. Proline accumulation, WSD and CAT antioxidant enzyme activity were reduced in presence of zeolite in drought stress conditions than under control. Selenium spraying with zeolite application in drought conditions increased RWC, CAT antioxidant enzyme activity and oil yield. Drought stress at fruit formation phase reduced oil content and oil yield more severe than that on flowering stage. Finally, it seems that zeolite and selenium application in dry lands are exposed to drought stress be helpful for physiological traits and oil yield improvement and prevention of decreased oil yield.