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Pure phloem sap from rice plant was collected by a method similarto the aphid technique using leafhoppers and planthoppers instead.A Yttrium-Aluminium Garnet laser was used to sever the insectstylets. Sap exuded from the plant through the stylet for upto 3 hr at a rate of 0.2 µl/hr. Analysis of the sap forsugars revealed that the only carbohydrate present was sucrose;its content was estimated to be 17% and remained at this levelfor 3 hr. (Received April 16, 1980; ) 相似文献
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Collection of rice phloem sap from stylets of homopterous insects severed by YAG laser 总被引:2,自引:0,他引:2
Pure phloem sap from rice plant was collected by a method similarto the aphid technique using leafhoppers and planthoppers instead.A Yttrium-Aluminium Garnet laser was used to sever the insectstylets. Sap exuded from the plant through the stylet for upto 3 hr at a rate of 0.2 µl/hr. Analysis of the sap forsugars revealed that the only carbohydrate present was sucrose;its content was estimated to be 17% and remained at this levelfor 3 hr. (Received April 16, 1980; ) 相似文献
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Sugar, Amino Acid and Inorganic Contents in Rice Phloem Sap 总被引:5,自引:0,他引:5
Rice phloem sap was obtained through severed stylets of brownplanthoppers and its chemical composition was determined. Sucrose,the only sugar detected, was present at 1725% (w/v) inthe sap. Amino acids were present at a total of 38% (w/v)and were found to be mostly in a free form. The amount of boundamino acids was estimated to be small, if any were present.Among the free amino acids, asparagine (1733% on a molarbasis), glutamate (614%), serine (1013%), glutamine(715%), threonine (56%) and valine (67%)were dominant, while cystine and methionine (00.2%) werepresent in minor amounts and -aminobutyric acid was not detected.The sap had a slightly alkaline pH (ca. 8.0). The inorganicconstituents detected by electron probe x-ray microanalyzerwere Na, S, P and K, with the K content being the highest. Theosmotic pressure was estimated to be 1315 atm. The aminoacid composition of the plant parts was determined and the differencesin the ease of phloem loading among amino acids were compared. (Received October 5, 1981; Accepted December 17, 1981) 相似文献
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