Pigment Change and Photosynthetic Response Characteristics of Plantycladus orientalis cv. Semperourescens

doi:10.11924/j.issn.1000-6850.casb2020-0782

Abstract

Abstract:

To reveal the physiological mechanism of leaf color change in Plantycladus orientalis cv. Semperourescens and to provide reference for the breeding and promotion of evergreen varieties in landscaping, the single individual of P. orientalis cv. Semperourescens, which is varietas of P. orientalis, was used as the test material, and the dynamic changes of leaf color, related pigment content and photosynthetic response characteristics of yellow leaves on the top of branches and green leaves at base during the growth period were studied. The results showed that from March to October, there was a dynamic change process of yellow-green-yellow in the yellow leaves of P. orientalis cv. Semperourescens, and a certain degree of greening in summer. In the same month, chlorophyll a (Chl a), chlorophyll b (Chl b), total chlorophyll (Chl) and carotenoid (Car) content in yellow leaves were significantly lower than those in green leaves, while, the ratio of Car to total chlorophyll (Car/Chl) content in yellow leaves was higher than that in green leaves. Chl contents first increased and then decreased both in yellow and green leaves, while Car contents first decreased, followed by a gentle change and then a sharp rise. In addition, the light saturation point of yellow leaves was lower than that of green leaves. The net photosynthetic rate (Pn) of yellow leaves was significantly lower than that of green leaves under the same light intensity. The photosynthetic index showed a trend of first increasing and then decreasing along with the time. Pn of yellow leaves from March to August were significantly lower than that of green leaves. Furthermore, there was a significantly positive correlation between photosynthetic index and Chl content, and a significantly negative correlation between photosynthetic index and Car/Chl content ratio. In conclusion, the yellow color of the leaves of P. orientalis cv. Semperourescens might be caused by the high ratio of Car/Chl content.

Key words: leaf color change, chlorophyll, carotenoid, photosynthesis, Plantycladus orientalis cv. Semperourescens

CLC Number:

S687

Liao Ting, Fu Lin, Guo Liqin, Liu Guobin, Wang Ye, Yao Yanwu, Cao Jun. Pigment Change and Photosynthetic Response Characteristics of Plantycladus orientalis cv. Semperourescens[J]. Chinese Agricultural Science Bulletin, 2021, 37(29): 56-63.

Figures/Tables 5

References 26

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月份	RHS颜色描述	黄叶	RHS颜色描述	绿叶
3月	Brilliant Yellow	7B	Strong Yellow Green	143A
4月	Brilliant Greenish Yellow	3A	Strong Yellow Green	144A
5月	Brilliant Greenish Yellow	3A	Strong Yellow Green	143B
6月	Brilliant Greenish Yellow	3A	Strong Yellow Green	143A
7月	Light Greenish Yellow	3C	Strong Yellow Green	143B
8月	Brilliant Greenish Yellow	2B	Deep Yellowish Green	141B
9月	Brilliant Greenish Yellow	6B	Strong Yellow Green	144A
10月	Vivid Yellow	13A	Strong Yellow Green	143A

月份	RHS颜色描述	黄叶	RHS颜色描述	绿叶
3月	Brilliant Yellow	7B	Strong Yellow Green	143A
4月	Brilliant Greenish Yellow	3A	Strong Yellow Green	144A
5月	Brilliant Greenish Yellow	3A	Strong Yellow Green	143B
6月	Brilliant Greenish Yellow	3A	Strong Yellow Green	143A
7月	Light Greenish Yellow	3C	Strong Yellow Green	143B
8月	Brilliant Greenish Yellow	2B	Deep Yellowish Green	141B
9月	Brilliant Greenish Yellow	6B	Strong Yellow Green	144A
10月	Vivid Yellow	13A	Strong Yellow Green	143A

	Chl a	Chl b	Chl	Car	类黄酮	Car/Chl	Pn	Gs	Ci	Tr	WUE
Chl a	1	0.801^**	0.979^**	0.570^**	-0.609^**	-0.328	0.599^**	0.330	0.314	0.362	0.046
Chl b	0.872^**	1	0.904^**	0.204	-0.267	-0.579^**	0.630^**	0.417^*	0.432^*	0.454^*	0.015
Chl	0.991^**	0.930^**	1	0.462^*	-0.520^**	-0.442^*	0.660^**	0.394	0.377	0.431^*	0.028
Car	-0.059	-0.093	-0.070	1	0.684^**	0.569^**	-0.083	-0.098	-0.355	-0.393	0.49^*
类黄酮	-0.371	-0.210	-0.340	0.425^*	1	-0.141	-0.313	-0.041	0.000	0.220	-0.617^**
Car/Chl	-0.745^**	-0.629^**	-0.734^**	0.521^**	0.108	1	-0.685^**	-0.374	-0.708^**	-0.770^**	0.432^*
Pn	0.860^**	0.644^**	0.829^**	0.016	-0.616^**	-0.680^**	1	0.798^**	0.698^**	0.782^**	-0.111
Gs	0.758^**	0.642^**	0.747^**	-0.143	-0.368	-0.519^**	0.820^**	1	0.589^**	0.697^**	-0.186
Ci	0.452^*	0.297	0.422^*	-0.070	-0.402	-0.528^**	0.635^**	0.589^**	1	0.742^**	-0.261
Tr	0.644^**	0.602^**	0.652^**	-0.437^*	-0.101	-0.576^**	0.663^**	0.917^**	0.455^*	1	-0.668^**
WUE	0.080	-0.102	0.034	0.560^**	-0.485^*	-0.025	0.193	-0.302	-0.002	-0.559^**	1

	Chl a	Chl b	Chl	Car	类黄酮	Car/Chl	Pn	Gs	Ci	Tr	WUE
Chl a	1	0.801^**	0.979^**	0.570^**	-0.609^**	-0.328	0.599^**	0.330	0.314	0.362	0.046
Chl b	0.872^**	1	0.904^**	0.204	-0.267	-0.579^**	0.630^**	0.417^*	0.432^*	0.454^*	0.015
Chl	0.991^**	0.930^**	1	0.462^*	-0.520^**	-0.442^*	0.660^**	0.394	0.377	0.431^*	0.028
Car	-0.059	-0.093	-0.070	1	0.684^**	0.569^**	-0.083	-0.098	-0.355	-0.393	0.49^*
类黄酮	-0.371	-0.210	-0.340	0.425^*	1	-0.141	-0.313	-0.041	0.000	0.220	-0.617^**
Car/Chl	-0.745^**	-0.629^**	-0.734^**	0.521^**	0.108	1	-0.685^**	-0.374	-0.708^**	-0.770^**	0.432^*
Pn	0.860^**	0.644^**	0.829^**	0.016	-0.616^**	-0.680^**	1	0.798^**	0.698^**	0.782^**	-0.111
Gs	0.758^**	0.642^**	0.747^**	-0.143	-0.368	-0.519^**	0.820^**	1	0.589^**	0.697^**	-0.186
Ci	0.452^*	0.297	0.422^*	-0.070	-0.402	-0.528^**	0.635^**	0.589^**	1	0.742^**	-0.261
Tr	0.644^**	0.602^**	0.652^**	-0.437^*	-0.101	-0.576^**	0.663^**	0.917^**	0.455^*	1	-0.668^**
WUE	0.080	-0.102	0.034	0.560^**	-0.485^*	-0.025	0.193	-0.302	-0.002	-0.559^**	1