A Quantitative Description of the Sorghum Root System

Rodriguez, H.G. (1989) A Quantitative Description of the Sorghum Root System. Masters thesis, Texas A&M University.

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Quantitative analysis of the root system of sorghum plants grown in a controlled environment chamber was investigated from 2 to 14 days after emergence ' (DAE). In a second experiment, alterations in the sorghum root system were quantified by withholding water in the root medium from 14 to 49 DAE under greenhouse conditions. Root systems of plants grown in controlled conditions showed a constant rate of elongation in the branched zone of the seminal root. A constant number of first order roots per unit length was attained up to 14 DAE. Considering the total root numbers at 14 DAE, second order roots represented 72% of the total population of roots, whereas first and third order roots represented 14 and 13% respectively. Constant rates of initiation of first and second order roots occurred on the branched zone of the seminal root. At 14 DAE the diameters of first, second and third order roots were 357. 146 and 96 pm respectively. and they represented approximately 4. 9 and 15 times smaller diameters than the crown roots. Number of first and second order roots could be predicted from the branched length of the seminal root since constant rates were observed. Root dry weight and length were strongly associated with leaf area and shoot dry weight....

Item Type: Thesis (Masters)
Author Affiliation: Texas A&M University
Subjects: Soil Science and Microbiology
Statistics and Experimentation
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 21 Jul 2013 11:00
Last Modified: 21 Jul 2013 11:00
URI: http://eprints.icrisat.ac.in/id/eprint/11185

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