E. Yasunaga, T. Uchino, S. Yoshida, J. Chikushi, F. Tanaka
{"title":"Prediction of respiration rate of garland chrysanthemum (Chrysanthemum coronarium) under distribution conditions.","authors":"E. Yasunaga, T. Uchino, S. Yoshida, J. Chikushi, F. Tanaka","doi":"10.2525/SHITA.21.143","DOIUrl":"https://doi.org/10.2525/SHITA.21.143","url":null,"abstract":"","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116578195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Estimation of Moisture Conditions in Organic and Inorganic Growing Media Based on Hydraulic Properties","authors":"Hideki Miyamoto, S. Yoshida, J. Chikushi, T. Eguchi, Yuji Ito","doi":"10.2525/SHITA.21.72","DOIUrl":"https://doi.org/10.2525/SHITA.21.72","url":null,"abstract":"水管理条件がヤシ殻培地中の水分環境に及ぼす影響を調べることを目的として，ヤシ殻と他の培地(砂およびロックウール)の保水性と透水性を測定した．そして，得られた測定結果と土中の鉛直1次元水分移動方程式に基づいて数値シミュレーションを実施し，各培地を同一環境下で用いた場合に予測される水分環境の差異について検討したところ，以下の知見を得た．(1) ロックウールとヤシ殻は高い水分保持能を持ち，特に緻密な間隙構造を有するヤシ殻は，極めて高い保水性を有することが明らかになった．(2) 全培地の透水性は，水分量の低下とともに指数関数的に低下した．なかでも，ヤシ殻は，透水性が他の培地よりも数オーダ低かったことから，水分移動が著しく阻害され易い培地であることが明らかになった．(3) 底面給液条件における数値シミュレーションより，同一条件で水管理を行っても，培地内の水分の量および圧力は培地によって異なること，またその差異が保水性や透水性といった培地固有の水分移動特性に起因することが明らかになった．(4) 多種多様な環境下における水分状態を予測できる数値シミュレーションは，作物の生育に適した水管理システムを構築するうえで有用な手法と考えられた．","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130545669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the root zone of the soil-less culture, stress conditions such as low temperature, drought and high salinity can be easily introduced and controlled by applying physical and chemical characteristics of water. These stress conditions in the root zone cause depres-sions in root absorption and leaf photosynthesis and resultantly bring osmotic stress and oxidative stress in the plant body. The osmotic stress and the oxidative stress can induce the respective plant adaptive functions of osmotic adjustment and antioxidation. These plant functions can be expected to bring high quality and value-added vegetables enriched with sugars, functional amino acids, antioxidants etc., if the induced stresses are not so serious that the stress damages are not fatal without the extreme depression in growth. In this paper, two examples of the short term stress application only to roots for production of value-added vegetables are demonstrated. By the one week application of low temperature (5℃) stress only to roots of spinach plants (Spinacia oleracea L.), sugars, ascorbic acid and Fe2+ were significantly enriched in leaves. Furthermore, concentrations of harmful substances of NO3- and oxalic acid were extremely decreased. The two weeks salt stress treatment to roots of tomato plants (Lycopersicon esculentum Mill.) by applying the Muroto deep seawater at the stage of rapid fruit growth induced the osmotic adjustment and the antioxidation, which brought high quality tomatoes enriched with sugar, minerals, functional amino acids and good flavour without occurrence of extremely small-sized fruits and blossom-end rot. These verify that the short term stress application only to roots in the soil-less culture is reliable for production of high quality and value-added vegetables.
{"title":"Production of value-added vegetables by applying environmental stresses to roots in soil-less culture","authors":"M. Kitano, K. Hidaka, K. Zushi, T. Araki","doi":"10.2525/SHITA.20.210","DOIUrl":"https://doi.org/10.2525/SHITA.20.210","url":null,"abstract":"In the root zone of the soil-less culture, stress conditions such as low temperature, drought and high salinity can be easily introduced and controlled by applying physical and chemical characteristics of water. These stress conditions in the root zone cause depres-sions in root absorption and leaf photosynthesis and resultantly bring osmotic stress and oxidative stress in the plant body. The osmotic stress and the oxidative stress can induce the respective plant adaptive functions of osmotic adjustment and antioxidation. These plant functions can be expected to bring high quality and value-added vegetables enriched with sugars, functional amino acids, antioxidants etc., if the induced stresses are not so serious that the stress damages are not fatal without the extreme depression in growth. In this paper, two examples of the short term stress application only to roots for production of value-added vegetables are demonstrated. By the one week application of low temperature (5℃) stress only to roots of spinach plants (Spinacia oleracea L.), sugars, ascorbic acid and Fe2+ were significantly enriched in leaves. Furthermore, concentrations of harmful substances of NO3- and oxalic acid were extremely decreased. The two weeks salt stress treatment to roots of tomato plants (Lycopersicon esculentum Mill.) by applying the Muroto deep seawater at the stage of rapid fruit growth induced the osmotic adjustment and the antioxidation, which brought high quality tomatoes enriched with sugar, minerals, functional amino acids and good flavour without occurrence of extremely small-sized fruits and blossom-end rot. These verify that the short term stress application only to roots in the soil-less culture is reliable for production of high quality and value-added vegetables.","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122184745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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