PHOTOPHYSIOLOGY OF TURION GERMINATION IN SPIRODELA-POLYRHIZA (L) SCHLEIDEN - THE CAUSE OF GERMINATION INHIBITION BY OVERCROWDING

被引：6

作者：

APPENROTH, KJ

HERTEL, W

AUGSTEN, H

机构：

[1] Department of Biology-Plant Physiology, Friedrich Schiller University, Jenan, DDR-6900, von-Hase-Weg 3, Germany (Democratic Republic

来源：

BIOLOGIA PLANTARUM | 1990年 / 32卷 / 06期

关键词：

D O I：

10.1007/BF02890887

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Red-light-induced (via phytochrome) germination decreased with increasing numbers of turions per germination flask (overcrowding). Three hypotheses concerning the mechanism of this germination inhibition were tested, related to abscisic acid, ethylene, and oxygen deficiency: (i) Although abscisic acid is a powerful inhibitor of turion germination it had to be excluded as a cause, because abscisic acid was not secreted from turions into the nutrient solution. (ii) Ethylene (ethrel) strongly inhibited growth of newly formed sprouts, but germination response itself was not inhibited. (iii) Germination inhibition did not appear if short light pulses were substituted by continuous irradiation. It reappeared in the presence of the photosynthesis inhibitor 3-(3,4-dichlorophenyl)-1, 1-dimethylurea, but it was not observed in aerated nutrient solutions, or when Petri dishes instead of Erlenmeyer flasks were used. Decreased oxygen concentrations in the nutrient solution were produced by turion respiration. Consequently, anaerobiosis within the nutrient solution caused by turion respiration was the reason for germination inhibition by overcrowding.

引用

页码：420 / 428

页数：9

共 14 条

[1]

Appenroth K.-J., Hertel W., Jungnickel F., Augsten H., Influence of nutrient deficiency and light on turion formation in Spirodela polyrhiza (L.) Schleiden, Biochemie und Physiologie der Pflanzen, 184, pp. 395-403, (1989)

[2]

Appenroth K.-J., Opfermann J., Hertel W., Augsten H., Photophysiology of turion germination in Spirodela polyrhiza (L.) Schleiden. II. Influence of after-ripening on germination kinetics, Journal of Plant Physiology, 135, pp. 274-279, (1989)

[3]

Augsten H., Kunz E., Appenroth K.-J., Photophysiology of turion germination in Spirodela polyrrhiza (L.) Schleiden. I. Phytochrome-mediated responses of light- and dark-grown turions, Journal of Plant Physiology, 132, pp. 90-93, (1988)

[4]

Beer S., Effects of CO2 and O2 on the photosynthetic O2 evolution of Spirodela polyrrhiza turions, PLANT PHYSIOLOGY, 79, pp. 199-201, (1985)

[5]

Bewley J.D., Black M., Physiology and Biochemistry of Seeds in Relation to Germination, (1982)

[6]

Czopek M., Studies on the external factors inducing the formation of turions in Spirodela polyrrhiza (L.) Schleiden, Acta Soc. Bot. Pol., 32, pp. 199-211, (1963)

[7]

Czopek M., The course of photosynthesis and respiration in germinating turions of Spirodela polyrrhiza, Bull. Acad. pol. Sci., Sér. Sci. biol., 12, pp. 463-469, (1964)

[8]

Farber E., Konigshofer H., Kandeler R., Ethylene production and overcrowding in Lemnaceae, Journal of Plant Physiology, 124, pp. 379-384, (1986)

[9]

Liebert H.-P., Zur Kontrolle des lichtinduzierten Wurzelwachstums bei Heterotrophkulturen von Lemna gibba L. durch Phytohormone, Biol. Rundschau, 18, pp. 169-171, (1980)

[10]

Saks Y., Negbi M., Ilan I., Involvement of native abscisic acid in the regulation of onset of dormancy in Spirodela polyrrhiza, Aust. J. Plant Physiol., 7, pp. 73-79, (1980)

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