Studies on the Nutritional Peculiarities of Halophytes with Special Reference to their Agricultural Use

盐生植物营养特性的研究，特别是其农业用途

基本信息

批准号：
60480052
负责人：
TAKAHASHI Eiichi
金额：
$ 2.69万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60480052/
关键词：
Halophyte Salt tolerance Euryhaline Atriplex Phragmites Mangrove Boron ピルビン酸キナーゼナトリウム吸収

项目摘要

The study has done under the threemajor research items.1) Collection and water culture of salt tolerant plants: Native plants growing in the abandoned salt farm and the salt accumulated soil of Thailand, Mangrove forest of Ishigaki Island were sampled and analyzed their mineral composition. Some of them were water cultured and water culture method for Atriplex gmelini (halophytic dicotyledon), Phragmites comunis (euryhaline monocotyledon) and Bruguiera gymnorrhiza (mangrove tree) were established.2) Mechanism of salt tolerance and nutritional peculiarities of halophytes: Atriplex gmelini took up a large amount of Na from the medium and accumulated it in vacuoles. In the cytoplasm, Na concentration was not so high but betain was sccumulated. Thus Atriplex produced the osmotic pressure inside the cell to cope with the high salt concentration in the medium. In the case of Phragmites cumunis however, excessive uptake of Na was suppressed metabolically. Phragmites did not decrease K/Na rati … More o in the cell so much as Atriplex did when the Na concentration in the medium increased. The K requirement of K dependent pyruvate kinase activity was not different between Atriplex and Phragmites. But co-existence of betaine which accumulate in Atriplex cell under high Na concentration media lowered the K requirement of pyruvate kinase of Atriplex. Atriplex had a tolerancy for high concentration of B(boron) in the medium and it seemed one of the physiological characteristics of halophytes which adapted to sea water contained high B.3) Effect of salt on the fertility of the soil: Among the factors of soil fertility, nitrogen is most important. So the effects of salt on the mineralization of organic nitrogen(ammonification), nitrification and symbiotic nitrogen fixation were examined. NaCl equivalent to sea water did not decrease the rate of ammonification so much, but severely suppressed nitrification. The effect of Nacl on the symbiotic nitrogen fixation showed through the effect on the growth of the host plants and depended on the salt tolerance of Legumes. Less

这项研究完成了三分之一的研究项目。1）耐盐植物的收集和水培养：在废弃的sart屁M中生长的本地植物，泰国盐积累的土壤，伊希加基岛的红树林被带来并分析了他们的矿物质它们的培养为Atriplex，并建立了Bruguiera Gymnorrhiza（红树林）。2）盐Toler的Halphytes Ini营养特性的机制从培养基中占据了大量NA并在细胞质中积聚。 ATRIPLEX PRODUCED THE OSMOTIC PRESSURE THE CELL TO COPE WITH THE COPE COPE WITH TOPE COPE COPE COPE COPE COPE WITH THE CONCENTRATION in The Medium. In in THE CASE OF PHRAGMITES CUMUNIS HOWEVER CELL SO MUCH ASTRIPLEX DID WHEN THEN THE NA CONCENTRATION in The Medium IncreaseD. K依赖性丙酮酸激酶活性的K要求在Atripleplex和phRagmites之间降低了Atriplex的丙酮酸激酶的需求。适应海水的halphytes的特征是土壤的高b。固定降低了氨化的速度，NaCl对固定剂的影响对宿主植物的生长产生了影响。