Phytogram Differences Between DPL 77 and DPL 20

W. Gensler


 
ABSTRACT

The PHYTOGRAM technique consists of the placement of invasive electrochemical sensors in the stem, petiole or peduncle of plants. The sensors yield an electropotential-time plot (PHYTOGRAM) which varies with the status of the plant and response of the plant to its environment. The object of this study was to determine the differences in the PHYTOGRAMs of two polar cotton cultivars: DPL 77 and DPL 20. The results indicate very significant differences in the average electropotential, magnitude of diurnal electropotential variation and response to temperature changes. Under the oxygen and ethanol hypothesis, these differences are interpreted in terms of the level and type of respiratory activity.

The results suggest that the breeding process, while largely based on biophysical phenotypes, has led to very wide differences in certain biochemical phenotypes.



Reprinted from 1990 Proceedings: Beltwide Cotton Production Research Conferences pp. 70 - 73
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998