浮烟移栽根代谢活性的研究

中国烟草科学 Pub Date : 2000-01-01 DOI:10.3381/0082-4623-44.1.65

L. Caruso, R. Pearce, F. Fannin, L. Bush

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引用次数: 0

摘要

摘要移栽浮子系统中的营养液通常不循环或曝气，可能会出现停滞和缺氧现象。在这个系统中，植物产生培养基、水和螺旋根。在标准浮子系统和低氧(近厌氧)环境下，研究了这些根系类型在幼苗发育过程中的代谢活性。用微传感器测定了烟草幼苗根尖耗氧量。近厌氧条件对漂浮系统中幼苗发育的影响减少了介质和水根的干物质积累。培养基根和螺旋根具有相似的代谢活性率，并且比水根的吸氧率高得多。浮子系统的近厌氧条件对培养基根的危害小于水根。

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METABOLIC ACTIVITY OF FLOAT-TOBACCO TRANSPLANT ROOTS1

Abstract The nutrient solution in the tobacco-transplant float system is not usually circulated or aerated, and may thus become stagnant and deficient in oxygen. In this system, plants produce media, water and spiral roots. The metabolic activity of these root types during seedling development was investigated in a standard float system and under a low oxygen (near-anaerobic) regime. Oxygen consumption by tobacco seedling root tips was measured using a microsensor. The effects of near-anaerobic conditions on seedling development in a float system reduced dry matter accumulation of both media and water roots. Media roots and spiral roots had a similar metabolic activity rate, and a much greater rate of oxygen uptake than did water roots. The near-anaerobic condition in the float system was less deleterious to media roots than water roots.

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来源期刊

中国烟草科学烟草

自引率

0.00%

发文量

3722

期刊介绍： Chinese Tobacco Science is an academic scientific journal (bimonthly) under the supervision of the Ministry of Agriculture and Rural Affairs of the People's Republic of China, and sponsored by the Tobacco Research Institute of the Chinese Academy of Agricultural Sciences and the Qingzhou Tobacco Research Institute of China National Tobacco Corporation. It was founded in 1979 and is publicly distributed nationwide. The journal mainly publishes academic papers on scientific research results, new production technologies, and modern management in my country's tobacco science research and tobacco production technology. In addition, it also publishes forward-looking review articles in the field of tobacco research. There are columns such as tobacco genetics and breeding, cultivation technology, modulation and processing, physiology and biochemistry, plant protection, review or monograph, quality chemistry, etc.