| Download | - View final version: Relationships between carbon dioxide exchange rate, photosynthetic area and biomass in pea (PDF, 642 KiB)
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| DOI | Resolve DOI: https://doi.org/10.4141/cjps86-064 |
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| Author | Search for: Hobbs, S. L. A.1 |
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| Affiliation | - National Research Council of Canada. NRC Plant Biotechnology Institute
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| Format | Text, Article |
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| Subject | photosynthesis; pea; chlorophyll content; stomatal resistance; Pisum sativum |
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| Abstract | Compensation between carbon dioxide exchange rate per unit photosynthetic area (CER) and total photosynthetic area (TPA) of a plant was examined in field-grown pea (Pisum sativum L.). Eight near-isogenic lines of cv. Alaska, representing all possible phenotypes of the genes af (leaflets transformed to tendrils), st (reduced stipule area) and tl (tendrils transformed to leaflets), were examined. The CER was measured on the leaflets (AfAf), tendrils (afafTlTl) or minute leaflets (afaftltl). The TPA was significantly reduced by the st gene in AfAf types (normal leaflets) with an apparently associated increase in CER. The st gene also significantly reduced the TPA in afaf types but there was no associated increase in CER. Tendrils had a lower CER than normal leaflets and comprised 22% of the TPA of the semi-leafless (afafStStTlTl) type. Crosses were made between a semi-leafless pea and four normal-leafed types previously selected for high or low CER. The CER means (normal leaflets) of the Fâ progeny showed variability which was related to parental values. This was also true for the CER means (tendrils) of the populations of semi-leafless Fâ segregants showing that genetic variability for CER can exist in tendrils. In the Fâ, tendril CER was correlated negatively to stomatal resistance and positively to chlorophyll content and final shoot dry weight (biomass). Genetic improvement in CER may be important when a plant ideotype requires substantial reduction in TPA. |
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| Publication date | 1986-07-01 |
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| Publisher | Canadian Science Publishing |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | NRCC-25555 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 3bb9b4fa-2663-4cd7-9cf6-2c60596f3f7e |
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| Record created | 2023-09-06 |
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| Record modified | 2023-09-06 |
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