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| Analysis on Root Exudates of Different Cadmium-accumulating Cultivars of Water Spinach |
| XIE Jie，LI Jianxing，GONG Yulian*，ZENG Bijian，YU Lehuan，HUANG Huiting，TANG Jian |
| Biology and Food Engineering Institute， Guangdong University of Education，Guangzhou 510303，Guangdong，China |
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Abstract In order to study the differences in root exudates components between 2 typical cultivars of
water spinach（Ipomoea aquatica Forsk.）with cadmium-accumulation，this paper carried out detection and
analysis on root exudates of a water spinach cultivar with low cadmium-accumulation‘QLQ’and a high
cadmium-accumulating cultivar‘T308’ by GC-MS method．The results showed that 22 compounds were
identified in the root exudates of‘ QLQ’ and‘ T308’，respectively，including acids，esters，hydrocarbon，
ketone，alcohols，phenols，hydrazines，etc．There were 13 same chemical compounds in root exudates of
‘QLQ’ and ‘T308’，9 specific compounds in root exudates of ‘QLQ’，and 9 specific compounds in root
exudates of ‘T308’．The relative contents of acids and ketones in root exudates of ‘QLQ’ were higher than
those in ‘T308’，while the relative content of esters，hydrocarbons，alcohols and hydrazine in root exudates
of‘ QLQ’ were lower than those in‘ T308’．There were differences in the species and relative content of root
exudates between 2 water spinach cultivars，which might be related to the differences in cadmium accumulating
capacity between these 2 cultivars．
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Received: 04 February 2021
Published: 08 May 2021
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