Effects of alkaline salt stress on growth and ion allocation of Sinocalycanthus chinensis

doi:10.3969/j.issn.1004-1524.2022.01.10

Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (1): 79-88.DOI: 10.3969/j.issn.1004-1524.2022.01.10

• Horticultural Science • Previous Articles Next Articles

Effects of alkaline salt stress on growth and ion allocation of Sinocalycanthus chinensis

ZHOU Beining(), MAO Lian, HUA Zhuangzhuang, LU Jianguo^*()

College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China

Received:2020-09-06 Online:2022-01-25 Published:2022-02-05
Contact: LU Jianguo

Abstract

Abstract:

In this study, the three years old Sinocalycanthus chinensis seedlings were treated with different concentrations of alkaline salts (NaHCO₃) solutions, and the response mechanism of Sinocalycanthus chinensis to alkaline salt stress was analyzed from the morphological growth and ion transport routes, so as to provide theoretical guidance for the rational development and utilization of Sinocalycanthus chinensis. The results showed that the seedling height, relative growth of ground diameter, biomass and root-shoot ratio decreased with the increase of saline-alkali stress. With the increase of saline-alkali concentration, the Na⁺ content in each organ were significantly higher than that in the control group, the sequence was as follows: root>leaf>stem. Under low concentration alkaline salt stress, the K⁺ content sequence was as follows: stem>root>leaf, while under high concentration stress, the K⁺ content sequence was as follows: leaf>stem>root. The Ca²⁺ content sequence was as follows: leaf>root>stem. The K⁺/Na⁺ ratio in the stems and leaves of Sinocalycanthus chinensis was much higher than that in the roots and the Ca²⁺/Na⁺ ratio in the leaves was much higher than that in the stems and roots. The sequence of root-stem selective transport capacity of K⁺ and Ca²⁺: K⁺>Ca²⁺, stem-leaf: Ca²⁺>K⁺, while the root-leaf selective transport capacity was basically the same.In conclusion,under alkaline salt stress, the stems and leaves of Sinocalycanthus chinensis prevented the entry of Na⁺ by absorbing K⁺ and Ca²⁺, separated the Na⁺ storage area in the roots to reduce the damage of salt ions to the aboveground part, and the leaves maintained ion balance by increasing the absorption of mineral elements.

Key words: Sinocalycanthus chinensis, alkaline salt stress, growth, ion transport

CLC Number:

S685.99

ZHOU Beining, MAO Lian, HUA Zhuangzhuang, LU Jianguo. Effects of alkaline salt stress on growth and ion allocation of Sinocalycanthus chinensis[J]. Acta Agriculturae Zhejiangensis, 2022, 34(1): 79-88.

Figures/Tables 6

References 33

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NaHCO₃浓度 NaHCO₃ concentration/%	根重 Root weight/g	茎重 Stem weight/g	叶重 Leaf weight/g	根冠比 Root shoot ratio	总干重 Total dry weight/g
0	6.744 0 a	9.342 7 a	7.440 0 a	0.406 7 a	23.526 7 a
0.1	4.764 0 b	9.086 7 a	5.990 7 ab	0.317 7 ab	19.841 3 b
0.2	4.922 3 b	8.084 0 ab	5.284 3 abc	0.376 3 ab	18.290 7 b
0.3	5.271 7 b	9.326 0 a	5.398 7 abc	0.366 3 ab	19.996 3 b
0.4	4.182 7 b	7.178 3 bc	3.855 7 bcd	0.383 3 ab	15.216 7 c
0.5	2.473 7 c	6.224 3 c	3.606 3 cd	0.250 0 b	12.304 3 d
0.6	2.604 0 c	5.748 0 c	3.011 3 d	0.301 3 ab	11.363 3 d
0.7	1.945 7 c	5.588 0 c	2.376 3 d	0.243 0 b	9.910 0 d

NaHCO₃浓度 NaHCO₃ concentration/%	根重 Root weight/g	茎重 Stem weight/g	叶重 Leaf weight/g	根冠比 Root shoot ratio	总干重 Total dry weight/g
0	6.744 0 a	9.342 7 a	7.440 0 a	0.406 7 a	23.526 7 a
0.1	4.764 0 b	9.086 7 a	5.990 7 ab	0.317 7 ab	19.841 3 b
0.2	4.922 3 b	8.084 0 ab	5.284 3 abc	0.376 3 ab	18.290 7 b
0.3	5.271 7 b	9.326 0 a	5.398 7 abc	0.366 3 ab	19.996 3 b
0.4	4.182 7 b	7.178 3 bc	3.855 7 bcd	0.383 3 ab	15.216 7 c
0.5	2.473 7 c	6.224 3 c	3.606 3 cd	0.250 0 b	12.304 3 d
0.6	2.604 0 c	5.748 0 c	3.011 3 d	0.301 3 ab	11.363 3 d
0.7	1.945 7 c	5.588 0 c	2.376 3 d	0.243 0 b	9.910 0 d

NaHCO₃浓度 NaHCO₃ concentration/%	主根长 Length of axial root/cm	一级侧根数(d>2 mm) Number of primary lateralroots(d>2 mm)	根体积 Root volume/cm³
0	17.333 3 a	26.333 3 a	3.333 3 a
0.1	12.633 3 bc	20.666 7 ab	2.666 7 ab
0.2	13.866 7 b	16.666 7 bc	2.400 0 abc
0.3	12.166 7 bc	14.666 7 bc	3.333 3 a
0.4	9.366 7 cd	12.666 7 cd	1.666 7 bc
0.5	8.200 0 d	13.666 7 cd	1.733 3 bc
0.6	8.333 3 d	11.000 0 cd	1.666 7 bc
0.7	5.900 0 d	8.000 0 d	1.366 7 c

NaHCO₃浓度 NaHCO₃ concentration/%	主根长 Length of axial root/cm	一级侧根数(d>2 mm) Number of primary lateralroots(d>2 mm)	根体积 Root volume/cm³
0	17.333 3 a	26.333 3 a	3.333 3 a
0.1	12.633 3 bc	20.666 7 ab	2.666 7 ab
0.2	13.866 7 b	16.666 7 bc	2.400 0 abc
0.3	12.166 7 bc	14.666 7 bc	3.333 3 a
0.4	9.366 7 cd	12.666 7 cd	1.666 7 bc
0.5	8.200 0 d	13.666 7 cd	1.733 3 bc
0.6	8.333 3 d	11.000 0 cd	1.666 7 bc
0.7	5.900 0 d	8.000 0 d	1.366 7 c

NaHCO₃浓度 NaHCO₃ concentration/%	根 Root		茎 Stem		叶 Leaf
NaHCO₃浓度 NaHCO₃ concentration/%	K⁺/Na⁺	Ca²⁺/Na⁺	K⁺/Na⁺	Ca²⁺/Na⁺	K⁺/Na⁺	Ca²⁺/Na⁺
0	5.60±0.68 a	4.76±0.57 a	27.24±1.90 ab	28.34±2.59 a	22.94±5.22 ab	57.37±15.11 a
0.1	2.97±0.05 b	3.47±050 b	30.53±5.20 a	22.51±6.16 a	22.98±4.38 ab	47.22±3.35 ab
0.2	2.01±0.22 c	1.60±0.08 cd	19.19±0.93 bc	9.35±0.52 b	23.22±4.66 ab	35.44±4.79 abc
0.3	1.24±0.18 cd	1.87±0.40 cd	21.89±2.13 bc	10.76±0.24 b	37.84±7.60 a	52.59±10.57 ab
0.4	1.23±0.25 cd	2.63±0.42 bc	17.61±1.62 cd	10.87±0.19 b	38.28±9.09 a	39.11±3.00 ab
0.5	1.04±0.38 cd	1.49±0.26 cd	14.13±2.94 cd	8.17±0.89 b	7.83±1.85 b	13.63±3.43 c
0.6	0.59±0.17 d	1.11±0.13 d	9.81±1.20 d	6.34±1.07 b	9.14±1.46 b	13.04±0.99 c
0.7	0.53±0.13 d	0.80±0.10 d	13.92±2.00 cd	8.44±1.50 b	20.14±6.98 ab	31.77±4.58 bc

Effects of alkaline salt stress on growth and ion allocation of Sinocalycanthus chinensis

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NaHCO₃浓度 NaHCO₃ concentration/%	根-茎 Root-stem		茎-叶 Stem-leaf		根-叶 Root-leaf
NaHCO₃浓度 NaHCO₃ concentration/%	S_K,Na	S_Ca,Na	S_K,Na	S_Ca,Na	S_K,Na	S_Ca,Na
0	4.95±0.41 c	6.15±0.93 b	0.83±0.17 bc	2.03±0.51 cd	3.98±0.53 d	11.62±2.07 c
0.1	10.24±1.58 bc	6.72±1.73 ab	0.84±0.29 bc	2.47±0.74 bcd	7.78±1.58 cd	14.09±1.79 bc
0.2	9.96±1.76 bc	5.85±0.19 b	1.19±0.18 bc	3.76±0.30 abc	12.50±4.17 bcd	22.01±2.16 bc
0.3	18.83±3.88 ab	6.37±1.48 b	1.71±0.27 ab	4.87±0.95 a	33.34±9.74 ab	33.68±13.15 ab
0.4	15.35±3.12 bc	4.42±0.88 b	2.26±0.60 a	3.59±0.21 abc	31.11±5.26 abc	16.23±4.23 bc
0.5	15.28±2.22 bc	5.78±0.96 b	0.55±0.04 c	1.62±0.23 d	8.41±1.37 bcd	9.72±2.61 c
0.6	20.82±7.52 ab	6.16±1.91 b	0.94±0.14 bc	2.12±0.18 bcd	19.14±7.69 abcd	12.37±2.62 Bc
0.7	28.96±6.62 a	10.63±1.79 a	1.38±0.30 abc	3.94±0.78 ab	43.58±16.15 a	41.71±9.14 Aa

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