Needle wax surface structure ofPinus sylvestrisas affected by ammonia

Autor: L. J. M. Van Der Eerden, T. BaČIc, P. Baas
Rok vydání: 1992
Předmět:
Zdroj: Acta Botanica Neerlandica. 41:167-181
ISSN: 0044-5983
DOI: 10.1111/j.1438-8677.1992.tb00496.x
Popis: Wax surfaces of current, first and second year needles of Pinus sylvestris L. from Open Top Chambers, both fumigated with ammonia and unfumigated, were examined with the scanning electron microscope. In the course of time the wax rodlets on peristomatal rims of treated and untreated plants became fused and agglomerated to various extents into morphologically different types of crusts. Compact peristomatal crusts were most frequent. Porous, particulate and melted' peristomatal crusts as well as epistomatal crusts were of rare occurrence and presumably represented a random phenomenon. No correlation was found between appearance of wax crusts and ammonia fumigation. Ammonia treatment did not affect fungal growth either. Quantitative estimates indicated a very weak, statistically insignificant, tendency of ammonia to increase the rate of the normal, age dependent wax degradation (...)
Databáze: OpenAIRE