Carbon assimilation and export from leaves of diverse cultivars of sorghum /
(Tx430 and B35, respectively) and a hybrid thereof. The
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (Tx430 and B35, respectively) and a hybrid thereof. The although differences in aerial biomass at earlier growth among genotypes at preboot and anthesis indicated that the are inconsistent among prior research projects. This assimilate to leaf starch were not due to a slower plant between preflowering and postflowering tolerant sorghum lines breeding programs. These phenotypic classes provide a source conditions and harvested immediately. Subsamples of plant differently than Tx430 or the hybrid. The similar biomass exposed to 14CO2 for 3 h under steady state labeling genotypes at grain filling. The carbon partitioning to leaf growth rate in B35 than Tx430 and the hybrid. It is have served as selection criteria in traditional plant hypothesized that photoassimilate retention in leaves under labeled leaves and the whole plant. All genotypes were grown liquid scintillation spectroscopy. Rates of sucrose objective of this project was to compare leaf carbon exchange of [ 14 C]assimilate export than Tx430 or the hybrid under of radiolabel to starch was greater in B35 than the other of variation for identifying and quantifying physiological organs were combusted and radioactivity was counted using Preflowering and postflowering classes of stress response preflowering and postflowering stress tolerance in sorghum processes that contribute to stress tolerance. However, quantified. Nonstructural carbohydrates in labeled leaves rate (CER), carbohydrate concentrations, and sucrose relationships between physiological stress responses and research identifies and compares physiological processes slower rate of export and greater partitioning of [14 C] stages did not differ among the genotypes. Under well- starch indicated B35 metabolized newly-formed carbohydrates synthesis and leaf export of [ 14 C]assimilate were synthesis rate, and [ 14 C]assimilate partitioning within tolerance to water stress. under irrigated and water limited regimes. Plants were was significantly lower in B35 than Tx430 or the hybrid, watered conditions, starch concentrations in labeled blades well-watered conditions predisposes B35 to postflowering well-watered conditions. Grain weight during grain filling were higher in B35 than Tx430 and the hybrid, and allocation were quantified using colorimetry. B35 exhibited lower rates |
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| Item Description: | "Major subject: Agronomy". Vita. |
| Physical Description: | viii, 41 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |