Study on the Correlation Between Leaf Yellowing of Chinese Yam and Physiological Indexes, Mineral Elements Content

doi:10.11924/j.issn.1000-6850.casb2022-0727

Abstract

Abstract:

To explore the correlation between leaf physiological indexes as well as mineral elements content and leaf yellowing of Chinese yam, the yam variety ‘Ya Yam No.1’ was taken as experimental materials, the fresh weight, dry weight, chlorophyll content, superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) activity and mineral elements content of yam leaves with different yellowing degree were measured, respectively. The results showed that: with the leaf yellowing degree deepening, leaves fresh weight, dry weight, dry matter content, and POD activity decreased obviously, chlorophyll a (Chla) and chlorophyll b (Chlb) content decreased dramatically, but Chla/Chlb showed a rising trend. SOD activity firstly increased and then decreased, and finally increased again. CAT activity showed bimodal curve variation tendency. The contents of N, S and B increased, while the contents of Ca, Mg, Fe and Mn decreased obviously. Correlation analysis showed that Chla and Chlb were very significantly positively correlated with Ca, Mg, Fe, Mn and POD activity, and significantly or very significantly negatively correlated with N, S and B. The results preliminarily confirmed that the decrease of chlorophyll and Ca, Mg, Fe, Mn contents in Chinese yam leaves was closely related to leaf yellowing.

Key words: Chinese yam, leaf yellowing, chlorophyll, antioxidant enzyme, mineral elements

LI Ju, CHANG Wei, GONG Xuefeng, LI Zhi, YANG Liang, SONG Zhanfeng, MIAO Mingjun. Study on the Correlation Between Leaf Yellowing of Chinese Yam and Physiological Indexes, Mineral Elements Content[J]. Chinese Agricultural Science Bulletin, 2023, 39(25): 27-32.

Figures/Tables 6

References 30

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级别	叶片数	总鲜重/g	单叶鲜重/g	总干重/g	单叶干重/g	干物质含量/%
0级	50	68.54	1.37	11.58	0.23	16.90
1级	50	54.91	1.09	6.65	0.13	12.11
2级	50	47.50	0.95	5.31	0.11	11.18
3级	50	46.46	0.93	5.06	0.10	10.89
4级	50	40.10	0.80	3.94	0.08	9.83

级别	叶片数	总鲜重/g	单叶鲜重/g	总干重/g	单叶干重/g	干物质含量/%
0级	50	68.54	1.37	11.58	0.23	16.90
1级	50	54.91	1.09	6.65	0.13	12.11
2级	50	47.50	0.95	5.31	0.11	11.18
3级	50	46.46	0.93	5.06	0.10	10.89
4级	50	40.10	0.80	3.94	0.08	9.83

级别	全N/(g/kg)	总Ca/%	总Mg/%	S/%	Fe/(mg/kg)	Mn/(mg/kg)	B/(mg/kg)
0级	33.40d	3.85a	0.467a	0.183c	106.00a	560a	19.60b
1级	49.49b	3.53b	0.353b	0.218b	90.40b	506a	19.70b
2级	38.50c	2.66c	0.316c	0.205b	79.60c	432b	22.70b
3级	51.13b	2.29d	0.314c	0.247a	76.50c	397b	22.50b
4级	56.57a	1.86e	0.296c	0.242a	65.40d	166c	35.60a

级别	全N/(g/kg)	总Ca/%	总Mg/%	S/%	Fe/(mg/kg)	Mn/(mg/kg)	B/(mg/kg)
0级	33.40d	3.85a	0.467a	0.183c	106.00a	560a	19.60b
1级	49.49b	3.53b	0.353b	0.218b	90.40b	506a	19.70b
2级	38.50c	2.66c	0.316c	0.205b	79.60c	432b	22.70b
3级	51.13b	2.29d	0.314c	0.247a	76.50c	397b	22.50b
4级	56.57a	1.86e	0.296c	0.242a	65.40d	166c	35.60a

	全N	总Ca	总Mg	S	Fe	Mn	B	Chla	Chlb	POD	CAT	SOD
全N	1
总Ca	-0.684^**	1
总Mg	-0.731^**	0.855^**	1
S	0.896^**	-0.801^**	-0.797^**	1
Fe	-0.745^**	0.953^**	0.936^**	-0.813^**	1
Mn	-0.749^**	0.888^**	0.712^**	-0.705^**	0.861^**	1
B	0.616^*	-0.772^**	-0.555^*	0.520^*	-0.749^**	-0.891^**	1
Chla	-0.706^**	0.903^**	0.673^**	-0.697^**	0.841^**	0.987^**	-0.887^**	1
Chlb	-0.595^*	0.886^**	0.622^*	-0.644^**	0.803^**	0.941^**	-0.842^**	0.984^**	1
POD	-0.482	0.581^*	0.401	-0.527^*	0.468	0.657^**	-0.492	0.607^**	0.628^**	1
CAT	0.098	0.426	0.122	-0.125	0.296	0.321	-0.332	0.228	0.245	-0.065	1
SOD	-0.344	0.489	0.530^*	-0.412	0.423	0.397	-0.207	0.118	0.187	0.364^*	-0.184	1