Stomatal Behavior in Inbred and Hybrid Maize

Clark, D. G.; Hecht, Helen; Curtis, Otis F.; Shafer, J. I.

doi:10.2307/2436999

Cited by 3 publications

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“…Clark, Hecht, Curtis, and Shafer (1941) found that the stomata of high yielding varieties of inbred and hybrid corn open earlier and close later than those of low yielding strains.…”

Section: Water In Plantsmentioning

confidence: 98%

Water in the physiology of plants, by A. S. Crafts, H. B. Currier and C. R. Stocking.

Crafts¹

1949

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Dean. Translations of many foreign papers were kindly put at our disposal by Dr. F. J. Veihmeyer and Mr. T. C. Broyer. For encourage-ment throughout the preparation of the manuscript and aid in its final organization we are grateful to Dr. W. W. Robbins. This book has been produced during troubled times. Because publication has been delayed, many current papers are not cited in the text. Some of these we are reporting here in an effort to bring our Bibliography up-to-date.Workers on the properties of liquids and solutions are in general agreement that the unusual behavior of water results from coordination of its molecules by hydrogen bonding. Assuming a bonding energy of 4.25 K cal. per mole, Taft and Sisler (1947) calculate that, of the energy absorbed upon heating, 11 per cent is utilized in breaking bonds during melting of ice, 16 per cent is used raising the temperature from the melting to the boiling point, and "JZ per cent goes in the vaporization process.Weissler (1949), using the velocity of sound at different temperatures to determine coordination, concludes that water undergoes a decrease in association of about 7.2 per cent between 0°C. and 100°C. Sound waves will detect molecular aggregates that are stable for 10"*^s econds. A previous value of 13.2 per cent was found using Raman spectrum analysis. The difference is due to the fact that the latter method detects aggregates that are stable for only lO"'^'* seconds.In contrast to Taft and Sisler, Searcy (1949) calculates a value of 6.4 ± 0.5 K cal. for the H-bond energy in water. He concludes that repulsive as well as attractive forces contribute to the dipole energy.Using a new formula to determine an index of association in liquids, Parshad (1947) has calculated values between 240 and 325 for a series of non-polar compounds;

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“…Clark, Hecht, Curtis, and Shafer (1941) found that the stomata of high yielding varieties of inbred and hybrid corn open earlier and close later than those of low yielding strains.…”

Section: Water In Plantsmentioning

confidence: 98%