An Ultrastructural Study of the Effects of 2,4-D on Tobacco Leaves

Autor:	D. D. Hemphill, J. A. White
Rok vydání:	1972
Předmět:	0106 biological sciences 010602 entomology Chemistry fungi 040103 agronomy & agriculture Ultrastructure food and beverages 0401 agriculture forestry and fisheries 04 agricultural and veterinary sciences Plant Science 01 natural sciences Agronomy and Crop Science
Zdroj:	Weed Science. 20:478-481
ISSN:	1550-2759 0043-1745
DOI:	10.1017/s0043174500036183
Popis:	Tobacco (Nicotiana tabacum L. ‘Samsun N. N.’) leaves were treated with (2,4-dichlorophenoxy)acetic acid (2,4-D) at a concentration of 500 mg/L by the syringe infiltration technique and then sampled at regular intervals. Electron microscopic examination of the treated tissue revealed that the response of the mesophyll cells to 2,4-D was related to the age of the leaf at the time of treatment. Expanding leaves from the upper portion of the plant exhibited a high degree of tolerance to 2,4-D. Mature, fully-expanded leaves from the lower part of the plant were highly sensitive to the herbicide, with the mesophyll cells undergoing rapid structural breakdown. This breakdown involved a rupturing and disintegration of the tonoplast, plasmalemma, and membranes of chloroplasts and mitochondria.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ae070d51e1889bdd647f2554b403fe3 https://doi.org/10.1017/s0043174500036183 Zobrazit plný text záznamu