摘要:

Research on the role of boron in plant metabolism is reviewed and evaluated. Absence of the element is shown to affect nucleic acid and carbohydrate metabolism, and the relationship between boron, auxin and phenolic compounds is discussed. It is concluded that the presence of boron is essential to maintain the structural integrity of plant membranes, and that many symptoms of boron deficiency in plants are secondary effects caused by changes in membrane permeability.

ISSN:0190-4167    

DOI:10.1080/01904168309363126

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

Ion‐specific initial salt effects due to supply of extreme K+, Na+, Cl or SO42‐combinations were studied on the carbohydrate pattern as well as on the activity of amylases, phosphorylase and invertase of two soybean varieties, Jackson and the more tolerant Lee.

ISSN:0190-4167    

DOI:10.1080/01904168309363127

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

Tree growth, photosynthesis, and the mineral nutrient content were investigated in ‘Redchief Delicious’ scions double worked on seedling rootstock with a variety of interstocks. The interstocks used were ‘Redchief Delicious’, M9, and a range of F. generation hybrids with internodes designated short, medium and long. The long internode graft union consistently produced more growth and dry weight per tree than the other interstocks. The ‘Redchief Delicious’ interstock had an unexplained negative effect on leaf, shoot and new root dry weight. There was no effect of interstock on photosynthesis initially (56 days) however photosynthesis increased with shorter nodal interstocks after 111 days. There were significant differences in scion and interstock bark elemental composition due to interstock combination. However, leaf composition varied slightly among the different interstock combinations. Manganese levels, independent of tissue type, did not vary between interstocks.

ISSN:0190-4167    

DOI:10.1080/01904168309363128

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

The effect of chloride and sulphate on the nitrate accumulated in lettuce plants (Lactuca sativaL., cv. deci minor) under low light conditions was examined. The plants were grown on a complete nutrient solution for circa 45 days and then chloride was substituted for the nitrate in the nutrient solution. In another experiment, sulphate was substituted for the nitrate in the nutrient solution. Approximately 5 days later a reduction in growth occurred. The nitrate in the plants was not completely exhausted and was very slowly available for reduction both in the leaf blades and midribs. It was immaterial whether sulphate or chloride was substituted for nitrate in the nutrient solution. Chloride was taken up from the solution but sulphate was not. In plants in both treatments, sugars accumulated concomitantly with the decrease in nitrate content.

ISSN:0190-4167    

DOI:10.1080/01904168309363129

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

Nitrate reductase activity (NRA) was studied in pea, a C3plant, and sorghum, a C4plant, at various stages of growth and development. Influence of moisture stress and nitrogen application was also observed since these factors have profound influence on growth and development.

ISSN:0190-4167    

DOI:10.1080/01904168309363130

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

ISSN:0190-4167    

DOI:10.1080/01904168309363125

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor