Photosynthetica 2019, 57(3):724-730 | DOI: 10.32615/ps.2019.049

The anatomical, physiological, and molecular analysis of a chlorophyll-deficient mutant in tree peony (Paeonia suffruticosa)

Q.S. CHANG1,5, L.X. ZHANG2,5, X.G. HOU2, Z. WANG1, N. WANG1, M.G. GONG3, Q.M. ZHANG1, H. CHEN1, Z.Q. SHI1, C.C. DENG1
1 College of Forestry, Henan University of Science and Technology, 471023 Luoyang, China
2 College of Agriculture, Henan University of Science and Technology, 471023 Luoyang, China
3 College of Food and Bioengineering, Henan University of Science and Technology, 471023 Luoyang, China

Tree peony is a famous ornamental plant in the world. However, little is known about the leaf color mutants in tree peony. The present study monitored the physiological and photosynthetic properties of a yellow leaf mutant (yl1) in tree peony. The results showed that the yl1 mutant had lower pigment contents, but increased chlorophyll (Chl) a/b and carotenoids to Chl ratio. Microstructure and ultrastructure analysis showed that the yl1 mutant had smaller chloroplasts, few thylakoid stacks, and a few stroma thylakoid membranes remained along with clusters of osmiophilic granules, which might result from inhibition at the reactions from coproporphyrinogen III to protoporphyrin IX. The yl1 mutant had lower leaf net photosynthetic rate, stomatal conductance, transpiration rate, and stomata limitation value, but higher intercellular CO2 concentration. Analysis of simple sequence repeat markers indicated that four pairs of primers could obtain different bands in the genome of the yl1 mutant compared to the wild type.

Keywords: chlorophyll precursor; chlorophyll synthesis; gas exchange; net photosynthetic rate; porphobilinogen; protochlorophyllide.

Received: September 19, 2018; Accepted: February 20, 2019; Prepublished online: May 30, 2019; Published: July 23, 2019Show citation

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CHANG, Q.S., ZHANG, L.X., HOU, X.G., WANG, Z., WANG, N., GONG, M.G., ... DENG, C.C. (2019). The anatomical, physiological, and molecular analysis of a chlorophyll-deficient mutant in tree peony (Paeonia suffruticosa). Photosynthetica, 57(3), 724-730. doi: 10.32615/ps.2019.049.
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