Effect of Abscisic Acid on Cadmium Accumulation of Grape Seedlings

doi:10.11924/j.issn.1000-6850.casb2021-0764

Abstract

Abstract:

To reduce the cadmium accumulation in grape and promote the grape growth under the cadmium pollution condition, a pot experiment was used to study the effect of spraying abscisic acid on the growth and cadmium accumulation of grape seedlings under cadmium pollution (5 mg/kg). The results showed that the biomass of each part of the grape seedlings and the photosynthetic pigment content in leaves all decreased first and then increased with the increase of the spraying concentration of abscisic acid (0, 1, 5, 10, and 20 μmol/L). Compared with those of control (0 μmol/L), with the increase of abscisic acid concentration, the POD and CAT activities of grape seedling leaves and the soil pH value increased first and then decreased, while SOD activity increased with the increase of abscisic acid concentration. In addition, spraying abscisic acid could make the cadmium content of each part of grape seedlings significantly lower than that of the control, and decrease with the increase of abscisic acid concentration. When the concentration of spraying abscisic acid was 20 μmol/L, the cadmium content of the roots and above-ground parts of grape seedlings decreased by 36.54% and 74.36% respectively compared with that of control. In summary, spraying abscisic acid could inhibit the cadmium absorption of grape, and the abscisic acid concentration of 20 μmol/L is the best.

Key words: grape, cadmium, abscisic acid, photosynthetic physiology, antioxidant physiology

CLC Number:

X53，S663.1，Q946.885+.6

HAN Jiaxi, FAN Zhonghan, DONG Yixia, LV Xinrui, LI Hongchun, CHEN Qinghua, LI Honghao, LIN Lijin, HU Rongping. Effect of Abscisic Acid on Cadmium Accumulation of Grape Seedlings[J]. Chinese Agricultural Science Bulletin, 2022, 38(34): 46-51.

Figures/Tables 6

References 41

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脱落酸浓度	根系	茎杆	叶片	地上部分
0 μmol/L	1.546±0.035bc	1.121±0.007b	2.628±0.051ab	3.749±0.058ab
1 μmol/L	1.186±0.013d	0.639±0.008e	2.181±0.073c	2.819±0.080d
5 μmol/L	1.425±0.039c	0.699±0.012d	2.514±0.070b	3.213±0.081c
10 μmol/L	1.532±0.032b	0.909±0.018c	2.620±0.071ab	3.529±0.089b
20 μmol/L	1.664±0.036a	1.258±0.025a	2.746±0.061a	4.004±0.086a

脱落酸浓度	根系	茎杆	叶片	地上部分
0 μmol/L	1.546±0.035bc	1.121±0.007b	2.628±0.051ab	3.749±0.058ab
1 μmol/L	1.186±0.013d	0.639±0.008e	2.181±0.073c	2.819±0.080d
5 μmol/L	1.425±0.039c	0.699±0.012d	2.514±0.070b	3.213±0.081c
10 μmol/L	1.532±0.032b	0.909±0.018c	2.620±0.071ab	3.529±0.089b
20 μmol/L	1.664±0.036a	1.258±0.025a	2.746±0.061a	4.004±0.086a

脱落酸浓度	叶绿素a	叶绿素b	叶绿素总量	类胡萝卜素
0 μmol/L	1.031±0.025b	0.515±0.012ab	1.546±0.036b	0.197±0.007a
1 μmol/L	0.663±0.016c	0.455±0.009c	1.119±0.026c	0.138±0.006b
5 μmol/L	0.987±0.018b	0.469±0.008c	1.457±0.026b	0.153±0.003b
10 μmol/L	1.000±0.040b	0.481±0.013bc	1.481±0.053b	0.156±0.004b
20 μmol/L	1.159±0.028a	0.545±0.015a	1.704±0.043a	0.209±0.008a

脱落酸浓度	叶绿素a	叶绿素b	叶绿素总量	类胡萝卜素
0 μmol/L	1.031±0.025b	0.515±0.012ab	1.546±0.036b	0.197±0.007a
1 μmol/L	0.663±0.016c	0.455±0.009c	1.119±0.026c	0.138±0.006b
5 μmol/L	0.987±0.018b	0.469±0.008c	1.457±0.026b	0.153±0.003b
10 μmol/L	1.000±0.040b	0.481±0.013bc	1.481±0.053b	0.156±0.004b
20 μmol/L	1.159±0.028a	0.545±0.015a	1.704±0.043a	0.209±0.008a

脱落酸/(μmol/L)	POD活性/[U/(g·min)]	SOD活性/(U/g)	CAT活性/(mg/g)
0	15.63±0.32b	102.41±2.63c	0.761±0.012c
1	17.71±0.50a	157.72±4.62b	1.110±0.037b
5	18.15±0.45a	173.43±0.52a	1.352±0.032a
10	14.95±0.21b	177.79±5.18a	1.262±0.044a
20	13.68±0.14c	183.95±5.37a	0.815±0.024c