Organic acid and sugar contents in sugarcane stem apoplast solution and their role as carbon source for endophytic diazotrophs |
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| Authors: | Constancio A Asis Jr Tasuku Shimizu Monowar K Khan Shoichiro Akao |
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| Institution: | 1. Department of Upland Farming Research , National Agricultural Research Center for Kyushu Okinawa Region , Miyakonojo, 885-0091, Japan;2. Department of Upland Farming Research , National Agricultural Research Center for Kyushu Okinawa Region , Miyakonojo, 885-0091, Japan;3. Faculty of Agriculture , Miyazaki University , 1-1, Gakuenkibanadai, Miyazaki, 889-2192, Japan;4. Bangladesh Institute of Nuclear Agriculture , P.O. Box 4, Mymensingh, Bangladesh |
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| Abstract: | We have identified aconitate, malate, and citrate organic acids as well as sucrose, glucose, and fructose sugar compounds from the apoplast solution of the stem of the sugarcane cultivars NiF-8 and RK86-129. The content of all the compounds varied with the cultivars, growth stages, and internode portions. Aconitate showed the highest content among the organic acids and sucrose was the predominant sugar compound. Moreover, Gluconoacetobacter diazotrophicus ATTCC 49037 and Herbaspirillum rubrisubalbicans PA18 differed in their ability to utilize sucrose or aconitate as sole carbon source. The G. diazotrophicus strain preferred sucrose to aconitate while H. rubrisubalbicans preferred aconitate to sucrose as carbon source. |
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| Keywords: | endophytic bacteria nitrogen fixation organic acid and sugar contents sugarcane apoplast solution |
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