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

Chang, Qingshan; Zhang, L.X.; Hou, Xiaogai; Wang, Z.; Wang, N.; Gong, Minggui; Zhang, Q.M.; Chen, H.; Shi, Zheng; Deng, Chong-Ling

doi:10.32615/ps.2019.049

Cited by 10 publications

(6 citation statements)

References 34 publications

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“…Soluble sugar is one of the main storage substances of the energy metabolism in plants. In this study, the decrease of soluble sugar content in yl1 mutant might occur due to the decline of PSII and PSI functions and lower photosynthetic rate (Chang et al 2019). This study was consistent with that of rice (Oryza sativa) yellow-leaf mutant (Hu 2017) and yellow-leaf mutant rgm (1-20YY) in common wheat (Triticum aestivum) (Liu et al 2016a).…”

Section: Discussionsupporting

confidence: 87%

“…The decrease of F0, Fm, F0', and Fm' in yl1 mutant showed a reduction of light energy capture efficiency and utilization in PSII reaction center. The lower values of Fv/ Fm, Fv'/Fm', ΦPSII, and ETR of yl1 mutant indicated that the light energy-utilization efficiency decreased in yl1 mutant (Xiao et al 2013, Yang et al 2014, which was consistent with the photosynthetic rate of yl1 mutant measured previously (Chang et al 2019). There was no significant difference in qP between yl1 mutant and WT, which might imply that the reduction of Chl content did not necessarily have a significant effect on photochemical quenching.…”

Section: Discussionsupporting

confidence: 83%

“…cv. 'Wu Long Peng Sheng' is a 'chlorina' mutant with the low content of total Chl and Chl b, abnormal thylakoid structure, and reduced photosynthetic capacity (Chang et al 2019). However, few studies have comprehensively focused on the functions of two photosystems in yl1 mutant of tree peony.…”

Section: Introductionmentioning

confidence: 99%

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Biochemical and photosystem characteristics of wild-type and Chl b-deficient mutant in tree peony (Paeonia suffruticosa)

Zhang¹,

Chang²,

Hou³

et al. 2021

Photosynt.

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In order to explore the adaptive strategies of tree peony yl1 mutant in response to photooxidative stress, the changes of biochemical parameters, chlorophyll fluorescence, and the modulated 820-nm reflection of yl1 mutant and wildtype plants were compared. We found the activities of superoxide dismutase and catalase, the contents of soluble protein, proline, superoxide radicals, hydrogen peroxide, malondialdehyde, and relative electrical conductivity were significantly higher than those of the wild type. The photochemical efficiency of PSII significantly decreased, while the proportion of heat dissipation of yl1 mutant increased greatly. The donor and acceptor side and electron transfer of PSII were greatly inhibited. Meanwhile, the performance of PSI and coordination of two photosystems decreased markedly in yl1 mutant. The yl1 mutant could reduce the damage caused by photooxidative stress by increasing the activity of antioxidant enzymes, the content of some osmoregulatory substances, and the proportion of heat dissipation.studying the mechanism of photosynthesis, the structure and function of the photosystems, and Chl biosynthesis, and are valuable for cultivating excellent varieties and molecular marker-assisted breeding (Zhang et al. 2020). Leaf-color mutants with yellow leaves, variegated leaves, stripes, and other characteristics have a high ornamental value in landscaping. Among them, a yellow-leaf mutant is a common mutation type. The paulownia (Paulownia fortnnei) mutant with white flowers presented light green leaves at the seedling stage, they turned yellow at the mature stage, and had a certain ornamental value (Ru et al. Highlights• Higher photooxidative damage was reported in tree peony yl1 mutant compared to the wild type. • The function and coordination of two photosystems in yl1 mutant decreased significantly. • The yl1 mutant increased the contents of antioxidants and osmoregulants and heat dissipation capacity in response to photooxidative stress.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 83%

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Biochemical and photosystem characteristics of wild-type and Chl b-deficient mutant in tree peony (Paeonia suffruticosa)

Zhang¹,

Chang²,

Hou³

et al. 2021

Photosynt.

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“…Regardless of the origin of albinism, most studies have shown that albino plants present not only the loss of chlorophyll, but also changes in plastid biogenesis (Caredda et al . 2004; Fambrini et al 2007; Wu et al 2014; Chang et al 2019). Chloroplasts are formed from proplastids during cell development and, in albino plants, these proplastids fail to differentiate into chloroplasts, leading to malformation of thylakoid membranes (Kumari et al 2009), the sites of photosystems and chlorophylls, as observed here in D. regia .…”

Section: Discussionmentioning

confidence: 99%

Albinism in plants – far beyond the loss of chlorophyll: Structural and physiological aspects of wild‐type and albino royal poinciana (Delonix regia) seedlings

et al. 2020

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The partial or complete loss of chlorophylls, or albinism, is a rare phenomenon in plants. In the present study, we provide the first report of the occurrence in albino Delonix regia seedlings and describe the morpho-physiological changes associated with albinism. • Wild-type (WT) and albino seedlings were characterized. Leaflets samples were processed following common procedures for analysis with light, scanning and transmission electron microscopy. The chlorophyll a fluorescence parameters and the carbohydrate, lipid and soluble protein content were also determined in leaf and cotyledon samples of both albino and WT seedlings. • Albino seedlings showed reduced growth. They also had lower chlorophyll and protein content in foliar tissues than WT seedlings, in addition to lower concentrations of lipids and carbohydrates stored in cotyledons. The chloroplasts of albino seedlings were poorly developed, with an undefined internal membrane system and the presence of plastoglobules. Wild-type seedlings had a uniseriate and hypoestomatic epidermis. The mesophyll was dorsiventral, consisting of a layer of palisade parenchyma and two to four layers of spongy parenchyma. In albino seedlings, the spongy parenchyma was compact, with few intercellular spaces, and the thickness of the mesophyll was larger, resulting in increased thickness of the leaf blade. Albino seedlings had higher stomatal density and number of pavement cells, although the stomata had smaller dimensions. • In addition to the partial loss of chlorophylls, albino D. regia showed changes at physiological and structural levels, demonstrating the crucial nature of photosynthetic pigments during the development and differentiation of plant leaf tissues/cells.

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“…However, the yellowing of leaves is getting in the focus of current research. For example, Li et al [2] reported that lower chlorophyll and higher carotenoid content (especially lutein) are the main factors for yellowing of gingko leaves, and Chang et al [7] found that the ratio of Plants 2020, 9, 169 of 17 chlorophyll a/b and carotenoid to chlorophyll increased in the leaves of yellow leaf mutant (yl1) of tree peony.…”

Section: Introductionmentioning

confidence: 99%

Physiological and Anatomical Differences and Differentially Expressed Genes Reveal Yellow Leaf Coloration in Shumard Oak

Dong

Huang

Chen

et al. 2020

Plants

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Shumard oak (Quercus shumardii Buckley) is a traditional foliage plant, but little is known about its regulatory mechanism of yellow leaf coloration. Here, the yellow leaf variety of Q. shumardii named ‘Zhongshan Hongjincai’ (identified as ‘ZH’ throughout this work) and a green leaf variety named ‘Shumard oak No. 23’ (identified as ‘SO’ throughout this work) were compared. ‘ZH’ had lower chlorophyll content and higher carotenoid content; photosynthetic characteristics and chlorophyll fluorescence parameters were also lower. Moreover, the mesophyll cells of ‘ZH’ showed reduced number of chloroplasts and some structural damage. In addition, transcriptomic analysis identified 39,962 differentially expressed genes, and their expression levels were randomly verified. Expressions of chlorophyll biosynthesis-related glumly-tRNA reductase gene and Mg-chelatase gene were decreased, while pheophorbide a oxygenase gene associated with chlorophyll degradation was up-regulated in ‘ZH’. Simultaneously, carotenoid isomerase gene, z-carotene desaturase gene, violaxanthin de-epoxidase gene and zeaxanthin epoxidase gene involved in carotenoid biosynthesis were up-regulated in ‘ZH’. These gene expression changes were accompanied by decreased chlorophyll content and enhanced carotenoid accumulation in ‘ZH’. Consequently, changes in the ratio of carotenoids to chlorophyll could be driving the yellow leaf coloration in Q. shumardii.

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

Cited by 10 publications

References 34 publications

Biochemical and photosystem characteristics of wild-type and Chl b-deficient mutant in tree peony (Paeonia suffruticosa)

Biochemical and photosystem characteristics of wild-type and Chl b-deficient mutant in tree peony (Paeonia suffruticosa)

Albinism in plants – far beyond the loss of chlorophyll: Structural and physiological aspects of wild‐type and albino royal poinciana (Delonix regia) seedlings

Physiological and Anatomical Differences and Differentially Expressed Genes Reveal Yellow Leaf Coloration in Shumard Oak

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