不同镉积累类型小麦各器官镉积累分布规律及机理分析

doi:10.3724/SP.J.1006.2022.11046

Abstract

Abstract:

The study of cadmium accumulation and distribution characteristics in different organs of wheat with low Cd accumulation is helpful to clarify the mechanism of low Cd accumulation in grain, which is of great significance for cultivating wheat varieties with Cd safety. A pot experiment was conducted to clarify the characteristics of Cd accumulation and distribution in different organs of different Cd accumulating wheat materials at the late growth stages. The physiological characteristics of the key organs, namely node I and glume, were further explored. The results showed that there was significant difference of Cd accumulation and distribution between the two wheats at maturity stage. Cd concentrations in node I and glume of Mianmai 37 were significantly higher than those of Kangxiu 3816. The stage of from filling to maturity was the key period for Cd accumulation in node I and glume of the accumulation of Mianmai 37. In subcellular level, Cd in node I and glume of both wheat was mostly distributed in the cell wall, accounting for 70%-80%. The distribution ratio of the soluble fraction of Mianmai 37 node I was 18%, and that of Kangxiu 3816 was 15%. The distribution ratio of the soluble fraction of Mianmai 37 glume was 19%, which was 2.7 times that of Kangxiu 3816. More Cd was found to distribute in soluble faction in node I and glume of Mianmai 37 compared with Kangxiu 3816. There was no significant difference of GSH concentration in node I of the two wheats at filling stage. The PC₁ and PC₂concentrations in node I of Mianmai 37 were significantly lower than those of Kangxiu 3816, while the PC₃ and PC₄ concentrations were significantly higher. The concentrations of GSH, PC₁, PC₂, PC₃, and PC₄ in the glume of Mianmai 37 were significantly higher than those of Kangxiu 3816. Cd retention in node I and the soluble fraction of glumes, as well as the great increase of NPT concentrations, contributed to low Cd accumulation in Mianmai 37. The present study investigates the mechanism of Cd retention in the key organs of wheat, which is of great significance to clarify the mechanism of Cd accumulation in wheat grains.

Key words: cadmium, low accumulation wheat, subcellular, non-protein, node, glume

FENG Ya-Juan, LI Ting-Xuan, PU Yong, ZHANG Xi-Zhou. Characteristics of cadmium accumulation and distribution in different organs of wheat with different cadmium-accumulating type[J].Acta Agronomica Sinica, 2022, 48(7): 1761-1770.

Figures/Tables 7

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TF_A-B	绵麦37 Mianmai 37	抗锈3816 Kangxiu 3816
根-茎 Root-Stem	0.846 ± 0.02^*	0.593 ± 0.01
茎-叶 Stem-Leaf	1.287 ± 0.06	1.968 ± 0.02^*
叶-穗 Leaf-Ear	1.439 ± 0.02^*	0.541 ± 0.03
穗-籽粒 Ear-Grain	0.367 ± 0.01	1.678 ± 0.01^*
叶片IV-节点III Leaf IV-Node III	0.435 ±0.024	0.441 ± 0.006
叶片III-节点II Leaf III-Node II	0.705 ± 0.043	0.806 ± 0.046
叶片II-节点I Leaf II-Node I	2.102 ± 0.007^*	1.183 ± 0.056
节间IV-节点III Stem IV-Node III	1.172 ± 0.126	1.196 ± 0.031
节间III-节点II Stem III-Node II	1.882 ± 0.055	1.900 ± 0.094
节间II-节点I Stem II-Node I	3.337 ± 0.218^*	2.620 ± 0.092
节点III-节间III Node III-Stem III	0.758 ± 0.024	0.669 ± 0.003
节点II-节间II Node II-Stem II	0.543 ± 0.029	0.434 ± 0.015
节点I-节间I Node I-Stem I	0.497 ± 0.052	0.626 ± 0.070
节间IV-叶片IV Stem IV-Leaf IV	2.600 ± 0.327	2.713 ± 0.072
节点III-叶片III Node III-Leaf III	2.151 ± 0.055^*	1.582 ± 0.068
节点II-叶片II Node II-Leaf II	0.830 ± 0.043	1.034 ± 0.093^*
节点I-叶片I Node I-Leaf I	0.341 ± 0.020	0.799 ± 0.059^*
节间I-花梗 Stem I-Pedcial	1.816 ± 0.047	1.814 ± 0.102
叶片I-花梗 Leaf I-Pedcial	3.241 ± 0.103^*	1.483 ± 0.089
花梗-颖壳 Pedcial-Glume	0.387 ± 0.026^*	0.256 ± 0.015
颖壳-籽粒 Glume-Grain	0.575 ± 0.071	2.368 ± 0.109^*

TF_A-B	开花期 Flowering stage		灌浆期 Filling stage		成熟期 Maturity stage
TF_A-B	绵麦37 Mianmai 37	抗锈3816 Kangxiu 3816	绵麦37 Mianmai 37	抗锈3816 Kangxiu 3816	绵麦37 Mianmai 37	抗锈3816 Kangxiu 3816
叶片II-节点I Leaf II-Node I	2.673 ± 0.250 b	2.100 ± 0.084 a	3.466 ± 0.116 a	2.994 ± 0.335 a	2.102 ± 0.007 c^*	1.183 ± 0.056 b
节间II-节点I Stem II-Node I	1.657 ± 0.055 c	1.750 ± 0.039 b	4.558 ± 0.180 a	10.707± 0.197 a^*	3.337 ± 0.218 b^*	2.620 ± 0.092 b
节点I-节间I Node I-Stem I	0.406 ± 0.011 b	0.565 ± 0.044 a^*	0.234 ± 0.006 c^*	0.174 ± 0.010 b	0.497 ± 0.052 a	0.626 ± 0.070 a
节点I-叶片I Node I-Leaf I	0.185 ± 0.007 b	0.345 ± 0.018 b^*	0.173 ± 0.005 b	0.208 ± 0.027 c	0.341 ± 0.020 a	0.799 ± 0.059 a^*
花梗-颖壳 Pedcial-Glume	0.631 ± 0.006 a	0.682 ± 0.024 a	0.458 ± 0.033 b^*	0.392 ± 0.009 b	0.387 ± 0.026 b^*	0.256 ± 0.015 c
颖壳-籽粒 Glume-Grain	—	—	0.643 ± 0.023 a	2.293 ± 0.149 a^*	0.575 ± 0.071 a	2.368 ± 0.109 a^*

Characteristics of cadmium accumulation and distribution in different organs of wheat with different cadmium-accumulating type

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[5]	LU Hai, LI Zeng-Qiang, TANG Mei-Qiong, LUO Deng-Jie, CAO Shan, YUE Jiao, HU Ya-Li, HUANG Zhen, CHEN Tao, CHEN Peng. DNA methylation in response to cadmium stress and expression of different methylated genes in kenaf [J]. Acta Agronomica Sinica, 2021, 47(12): 2324-2334.
[6]	ZHANG Yun, WANG Dan-Mei, WANG Xiao-Yuan, REN Qing-Wen, TANG Ke, ZHANG Li-Yu, WU Yu-Huan, LIU Peng. Effects of exogenous jasmonic acid on photosynthetic characteristics and cadmium accumulation of Helianthus tuberosus L. under cadmium stress [J]. Acta Agronomica Sinica, 2021, 47(12): 2490-2500.
[7]	MA Meng, YAN Hui, GAO Run-Fei, KOU Meng, TANG Wei, WANG Xin, ZHANG Yun-Gang, LI Qiang. Construction linkage maps and identification of quantitative trait loci associated with important agronomic traits in purple-fleshed sweetpotato [J]. Acta Agronomica Sinica, 2021, 47(11): 2147-2162.
[8]	WANG Zhen, YAO Meng-Nan, ZHANG Xiao-Li, QU Cun-Min, LU Kun, LI Jia-Na, LIANG Ying. Prokaryotic expression, subcellular localization and yeast two-hybrid library screening of BnMAPK1 in B. napus [J]. Acta Agronomica Sinica, 2020, 46(9): 1312-1321.
[9]	WANG Dan-Dan, LIU Hong-Juan, WANG Hong-Xia, ZHANG Peng, SHI Chun-Yu. Cloning and functional analysis of the sweet potato sucrose transporter IbSUT3 [J]. Acta Agronomica Sinica, 2020, 46(7): 1120-1127.
[10]	ZHENG Qing-Lei,YU Chen-Jing,YAO Kun-Cun,HUANG Ning,QUE You-Xiong,LING Hui,XU Li-Ping. Cloning and expression analysis of sugarcane Fe/S precursor protein gene ScPetC [J]. Acta Agronomica Sinica, 2020, 46(6): 844-857.
[11]	HENG You-Qiang,YOU Xi-Long,WANG Yan. Pathogenesis-related protein gene SfPR1a from Salsola ferganica enhances the resistances to drought, salt and leaf spot disease in transgenic tobacco [J]. Acta Agronomica Sinica, 2020, 46(4): 503-512.
[12]	LI Na-Na, LIU Ying, ZHANG Hao-Jie, WANG Lu, HAO Xin-Yuan, ZHANG Wei-Fu, WANG Yu-Chun, XIONG Fei, YANG Ya-Jun, WANG Xin-Chao. Promoter cloning and expression analysis of the hexokinase gene CsHXK2 in tea plant (Camellia sinensis) [J]. Acta Agronomica Sinica, 2020, 46(10): 1628-1638.
[13]	Gui-Hong LIANG,Ying-Peng HUA,Ting ZHOU,Qiong LIAO,Hai-Xing SONG,Zhen-Hua ZHANG. Bioinformatics analysis and response to nitrate-cadmium stress of NRT1.5 and NRT1.8 family genes in Brassica napus [J]. Acta Agronomica Sinica, 2019, 45(3): 365-380.
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