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Stomate Density and Size as Related to Ozone‐Induced Weather Fleck in Tobacco 1
Author(s) -
Dean C. E.
Publication year - 1972
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1972.0011183x001200040054x
Subject(s) - ozone , nicotiana tabacum , biology , stomatal density , horticulture , tobacco leaf , botany , photosynthesis , meteorology , physics , biochemistry , agricultural engineering , gene , engineering
A study was conducted to investigate the relationship between stomate density and size on reaction of tobacco ( Nicotiana tabacum L.) to elevated concentrations of ozone. The resistant varieties ‘Florida 20’ and ‘C‐80’ averaged 25.4 stomates per mm 2 on the adaxial leaf surface, while the susceptible varieties ‘2612‐2,’ ‘2612‐3,’ and ‘Bel W‐3’ averaged 37.4. This decrease in stomate density by one‐third in resistant varieties is thought to be associated with resistance by reducing the amount of ozone‐rich air which can enter the leaf. No relationship was found between stomatal size and plant reaction to ozone.