NDLI: Spectral properties and the number of photosynthetic reaction centers in chlorophyll-deficient mutants of Pisum sativum

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Russian Journal of Plant Physiology : Volume 52, Issue 1, January 2005

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Spectral properties and the number of photosynthetic reaction centers in chlorophyll-deficient mutants of Pisum sativum

Content Provider	Springer Nature Link
Author	Ladygin, V. G. Vaishlya, O. B.
Copyright Year	2005
Abstract	Spectral and photochemical properties were analyzed on intact chloroplasts and pigment-protein complexes isolated with gel electrophoresis from pea (Pisum sativum L.) leaves of parental variety Torsdag and of chlorophyll-deficient mutants chlorotica 2004 and 2014. Measurements of chlorophyll absorption and fluorescence spectra and of second derivative low-temperature (−196°C) spectra clarified exact positions of fluorescence maxima and revealed the chlorophyll forms of individual complexes in samples investigated. The chlorotica 2004 mutant, whose hybrids yield the heterosis effect, was characterized by the decreased accumulation of chlorophyll forms absorbing at 690, 697, and 708 nm, known to constitute the core antenna in the vicinity of photosystem I (PSI) reaction center. In the chlorotica 2014 mutant, whose hybrids are low productive, the interaction between PSI and PSII complexes was weakened, but no other difference from the parental variety was observed. The analysis of PSI and PSII photochemical activities, as well as estimates of light-harvesting antenna size and the number of reaction centers revealed that the chlorotica 2004 mutant is deficient in the number of PSI reaction centers by a factor of 1.7. This deficiency resulted from the mutation-induced disorder in biosynthesis of chlorophyll a-protein complex of PSI. It appears that gene interactions between the 2004 mutant and the parental variety Torsdag enhance the functional and metabolic activity of leaves in their hybrids, thereby yielding the heterosis effect.
Starting Page	147
Ending Page	157
Page Count	11
File Format	PDF
ISSN	10214437
Journal	Russian Journal of Plant Physiology
Volume Number	52
Issue Number	2
e-ISSN	16083407
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2005-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pisum sativum chloroplasts fluorescence chlorophyll forms pigment-protein complexes number of photosystem reaction centers heterosis Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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