• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 46
  • 20
  • 8
  • 6
  • 3
  • 2
  • 1
  • 1
  • Tagged with
  • 95
  • 21
  • 17
  • 13
  • 12
  • 11
  • 11
  • 10
  • 8
  • 8
  • 8
  • 7
  • 7
  • 7
  • 7
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Surface anatomy of weed leaves with particular reference to stomata

Ormrod, David Jeremy January 1966 (has links)
Thirty-five species of weeds were grown in a field nursery in order to obtain comparable data on the number, size, and surface distribution of their stomata. Mature leaves were cleared, stained, and mounted for microscopic examination. The mean numbers of stomata per mm² of leaf surface ranged from 2.3 to 294.9. The mean lengths varied from 21.6μ to 59.0μ . Twenty species had more stomata on the lower than on the upper surface, while only 3 species had significantly more on the upper than on the lower surface. Between species there was negative correlation of stomatal density with length, but between surfaces within species, the lengths remained fairly constant despite differences in stomatal densities. Plants grown in partial shade had relatively more stomata/mm² than those grown in full sun. Similarly, leaves taken in July had a greater density of stomata than those harvested in June. In neither case could the differences be attributed to environmental factors, alone. A slight but significant correlation of stomatal density on the upper surface with known susceptibility to 2,4-D was detected. A greenhouse experiment using picloram sprays on 3 of the species, indicated greater penetration associated with dense stomata on the lower surface than with sparse stomata on the upper surface. A series of drawings were done depicting the different stomatal characteristics and types of trichomes. It was estimated that the leaves of 9 species were sufficiently hairy to influence retention or penetration of sprays. / Land and Food Systems, Faculty of / Graduate
2

STOMATAL FREQUENCY IN DROUGHT-TOLERANT AND DROUGHT-SUSCEPTIBLE SORGHUM BICOLOR (L.) MOENCH GENOTYPES GROWN UNDER MOISTURE STRESS AND NONSTRESS.

Shawesh, Guimaa Ali, 1950- January 1986 (has links)
No description available.
3

Reversible plant movement studied at single cell resolution

Irving, Michael January 1996 (has links)
No description available.
4

Protein and amino acids contents, nitrate reductase activity, and stomatal resistance of aneuploid wheat (Triticum aestuvum L.) variety "Chinese spring"

Chu, Chang-Chi January 2010 (has links)
Digitized by Kansas Correctional Industries
5

Environmental and physiological control of stomates in douglas-fir and other species /

Johnson, Jon Dale. January 1980 (has links)
Thesis (Ph. D.)--Oregon State University, 1981. / Typescript (photocopy). Includes bibliographical references (leaves 5-8). Also available on the World Wide Web.
6

Stomatal activity in semi-arid site ponderosa pine

Drew, Allan Pierce January 1967 (has links)
No description available.
7

Variations in number of leaf stomata and number of leaf vascular bundles in bermuda-grass, Cynodon dactylon (L.) Pers.

Akkad, Hani Abdul-Hameed, 1930- January 1968 (has links)
No description available.
8

Factors affecting stomatal opening of creosotebush (Larrea tridentata (DC.) Cov.) and their combined effect on herbicide activity

Warskow, William Lawrence, 1939- January 1965 (has links)
No description available.
9

The role of potassium ions in stomatal movement in Kalanchoe blossfeldiana /

Ruiter, Maarten Harm. January 1974 (has links) (PDF)
Thesis (B.Sc. (Hons.)) -- University of Adelaide, Dept. of Botany, 1975.
10

Certain water relations of the genus Prunus

Hendrickson, A. H. January 1926 (has links)
Thesis (Ph. D.)--Leland Stanford Junior University, 1926. / No. 19 of v. 1 of Hillgardia, published by the California Agricultural Experiment Station, with thesis note on cover. Cover title. "Literature cited": p. 504-505.

Page generated in 0.0544 seconds