scholarly journals Continuous Measurement of Macronutrient Ions in the Transpiration Stream of Intact Plants Using the Meadow Spittlebug Coupled with Ion Chromatography

2002 ◽  
Vol 130 (3) ◽  
pp. 1436-1442 ◽  
Author(s):  
M. Malone
Keyword(s):  
Ion Chromatography ◽  
Continuous Measurement ◽  
Transpiration Stream ◽  
Intact Plants ◽  
Meadow Spittlebug

Mediation of rapid electrical, metabolic, transpirational, and photosynthetic changes by factors released from wounds. I. Variation potentials and putative action potentials in intact plants

1976 ◽  
Vol 54 (23) ◽  
pp. 2642-2650 ◽  
Author(s):  
Jerome W. Van Sambeek ◽  
Barbara G. Pickard
Keyword(s):  
Action Potentials ◽  
Chemical Substance ◽  
Variation Potential ◽  
Transpiration Stream ◽  
Single Leaf ◽  
Intact Plants

Damaging representative plants from five angiosperm families by heating or crushing a small portion of a single leaf results in an electrical change which may spread throughout the shoot. In Mimosa, similar changes have previously been identified as variation potentials.Except in one of the five plants, a variation potential is often accompanied by brief fluctuations which may propagate either basipetally or acropetally and which have many of the properties of action potentials.The spread of a variation potential as described in Mimosa is due to the concommitant spread of a chemical substance in the transpiration stream. In this paper, it is shown that the spread of the purported variation potential is compatible with movement of material in the transpiration stream. In the next paper causation by a substance or group of substances, at present called Ricca's factor, is demonstrated.

Freeze-Fracture Studies of Membranes in Developing Sieve Elements in a Plant Tissue Culture

1980 ◽  
Vol 38 ◽  
pp. 636-637
Author(s):  
R. D. Sjolund ◽  
C. Y. Shih
Keyword(s):  
Plant Tissue ◽  
Cultured Cells ◽  
Freeze Fracture ◽  
Tissue Cultures ◽  
Sieve Elements ◽  
Intact Plants ◽  
Plant Tissue Cultures ◽  
Whole Plants ◽  
Energy Dependent ◽  
Similar Elements

The differentiation of phloem in plant tissue cultures offers a unique opportunity to study the development and structure of sieve elements in a manner that avoids the injury responses associated with the processing of similar elements in intact plants. Short segments of sieve elements formed in tissue cultures can be fixed intact while the longer strands occuring in whole plants must be cut into shorter lengths before processing. While iyuch controversy surrounds the question of phloem function in tissue cultures , sieve elements formed in these cultured cells are structurally similar to those of Intact plants. We are particullarly Interested In the structure of the plasma membrane and the peripheral ER in these cells because of their possible role in the energy-dependent active transport of sucrose into the sieve elements.

Direct Measurement of the Listening of Hearing-Impaired Children

1970 ◽  
Vol 13 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Mary Mira
Keyword(s):  
Direct Measurement ◽  
Continuous Measurement ◽  
Hearing Impaired ◽  
Reinforcement System ◽  
School Aged Children ◽  
Conjugate Reinforcement ◽  
Impaired Children ◽  
Hearing Impaired Children

Listening, a significant dimension of the behavior of hearing-impaired children, may be measured directly by recording childrens' responses to obtain audio narrations programmed via a conjugate reinforcement system. Twelve hearing-impaired, school-aged children responded in varying ways to the opportunity to listen. Direct and continuous measurement of listening has relevance for evaluation of remediation methods and for discovery of variables potentially related to listening.

The effect of 8 days of microgravity on regeneration of intact plants from protoplasts

1994 ◽  
Vol 92 (3) ◽  
pp. 404-411 ◽  
Author(s):  
Ole Rasmussen ◽  
Carolyn A. Baggerud ◽  
Hilde C. Larssen ◽  
Kjell Evjen ◽  
Tor-Henning Iversen
Keyword(s):  
Intact Plants

Continuous measurement of free cortisol profiles

2013 ◽  
pp. 1-1
Author(s):  
Ragini C Bhake ◽  
Jack A Leendertz ◽  
Astrid C E Linthorst ◽  
Stafford L Lightman
Keyword(s):  
Continuous Measurement ◽  
Free Cortisol
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