Effects of Drought Stress on Growth and Physiological and Biochemical Indexes of Potato Varieties

doi:10.11924/j.issn.1000-6850.casb2021-1175

Abstract

Abstract:

This experiment studied the physiological mechanism of different potato varieties under drought stress, so as to provide a theoretical basis for potato drought resistance breeding and cultivation. ‘Jizhangshu No.8’, ‘Jizhangshu No.12’ and ‘Kexin No.1’ were used to study the changes of potato growth and physiological and biochemical indexes under different drought stress treatments in the shed, and evaluate their drought resistance. The results showed that the growth indexes, such as yield, plant height, stem diameter and stem-leaf fresh weight, decreased significantly under drought stress. With the increase of stress degree, the peroxidase activity (POD) of the three varieties increased gradually, and the superoxide dismutase (SOD) activities increased first and then decreased,and the soluble protein content displayed an increasing trend. Additionally, the variation level of the three indexes were different among the three varieties, and the rising range of the indexes of ‘Jizhangshu No.8’ and ‘Jizhangshu No.12’ were higher than that of ‘Kexin No.1’. Moreover, the tissue relative water content decreased gradually when the drought stress was increased. The order of drought resistance from strong to low was ‘Jizhangshu No.8’, ‘Jizhangshu No.12 ’and ‘Kexin No.1’ through comprehensive analysis and evaluation. The results showed that potato varieties obtained strong drought resistance by a series of physiological and biochemical changes.

Key words: potato, drought stress, physiological and biochemical indexes, growth, drought resistance evaluation

CLC Number:

S532

ZHANG Ruijiu, MA Hui, JI Lijie, REN Dezhi, LI Shuangdong, ZHANG Yaohui, WANG Lihong. Effects of Drought Stress on Growth and Physiological and Biochemical Indexes of Potato Varieties[J]. Chinese Agricultural Science Bulletin, 2022, 38(15): 34-39.

Figures/Tables 11

References 25

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品种名称	处理	大中薯率/%	产量/(kg/hm²)	抗旱系数	抗旱指数
冀张薯12号	A	91.22	47093.40 a	-	-
	B	84.89	40464.00 c	0.86	0.93
	C	79.31	30282.00 d	0.64	0.67
冀张薯8号	A	88.81	43707.60 b	-	-
	B	84.91	39330.00 c	0.90	0.95
	C	80.89	30782.70 d	0.70	0.75
克新1号	A	85.60	37551.60 c	-	-
	B	81.89	32285.40 d	0.86	0.74
	C	76.65	26202.00 e	0.70	0.63

品种名称	处理	大中薯率/%	产量/(kg/hm²)	抗旱系数	抗旱指数
冀张薯12号	A	91.22	47093.40 a	-	-
	B	84.89	40464.00 c	0.86	0.93
	C	79.31	30282.00 d	0.64	0.67
冀张薯8号	A	88.81	43707.60 b	-	-
	B	84.91	39330.00 c	0.90	0.95
	C	80.89	30782.70 d	0.70	0.75
克新1号	A	85.60	37551.60 c	-	-
	B	81.89	32285.40 d	0.86	0.74
	C	76.65	26202.00 e	0.70	0.63

品种名称	处理	株高/cm	茎粗/cm	茎叶鲜重/g
冀张薯12号	A	116.50	1.29	602.50
	B	97.00	1.18	388.33
	C	88.23	1.12	275.10
冀张薯8号	A	127.00	1.09	612.50
	B	111.67	1.03	426.67
	C	99.00	1.01	345.00
克新1号	A	102.00	1.07	471.67
	B	90.21	0.99	321.67
	C	88.00	0.97	240.00

品种名称	处理	株高/cm	茎粗/cm	茎叶鲜重/g
冀张薯12号	A	116.50	1.29	602.50
	B	97.00	1.18	388.33
	C	88.23	1.12	275.10
冀张薯8号	A	127.00	1.09	612.50
	B	111.67	1.03	426.67
	C	99.00	1.01	345.00
克新1号	A	102.00	1.07	471.67
	B	90.21	0.99	321.67
	C	88.00	0.97	240.00

品种名称	处理	POD活性/ [U/(mg·min)]	变化幅度 /±%	差异显著性
品种名称	处理	POD活性/ [U/(mg·min)]	变化幅度 /±%	0.05	0.01
冀张薯12号	A	0.89	-	b	B
	B	1.60	79.78	a	A
	C	1.83	105.62	a	A
冀张薯8号	A	0.42	-	bc	B
	B	0.54	28.57	bc	B
	C	0.86	104.76	b	B
克新1号	A	0.30	-	c	B
	B	0.41	36.67	bc	B
	C	0.51	70.00	bc	B