Phytotoxic substances in root exudates of cucumber (Cucumis sativus L.)

Yu, Jing; Matsui, Yoshihisa

doi:10.1007/bf02065988

Cited by 184 publications

(116 citation statements)

References 21 publications

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“…The allelochemicals released from root exudates into the liquid culture system were trapped in a column (diameter 15 mm) containing 20 ml XAD-4 resin (Sigma, USA) (Tang and Young, 1982). Two seedlings were placed in a 12-L plastic vessel containing Enshi hydroponic culture solution (Yu and Matsui, 1994). The hydroponic nutrient solution was prepared using deionized water and was changed every 10 days.…”

Section: Continuous Root Exudates Cultivation and Trapping Systemmentioning

confidence: 99%

“…Matsum and Nakai) is commonly cultivated in continuous cropping systems in monoculture and this can lead to serious problems including poor plant growth and declining production over time (Zhou and Everts, 2004). Some studies have shown that cucurbit crops are vulnerable to autotoxicity which leads to nutrient uptake disorders (Yu and Matsui, 1994) and promotion of soil-borne disease development (Ye et al, 2004). Watermelon is an important cucurbit crop species whose allelopathic potential has recently attracted widespread interest.…”

Section: Introductionmentioning

confidence: 99%

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Allelopathic potential of watermelon tissues and root exudates

Hao

Wang

Christie

et al. 2007

Scientia Horticulturae

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Allelopathic potential of watermelon in hydroponic culture was investigated using the continuous root exudates trapping system (CRETS). Laboratory bioassays and high-performance liquid chromatography (HPLC) were used for quantification of phytotoxins in different plant tissues and root exudates collected using XAD-4 resin. Seedling growth of both watermelon and lettuce was significantly inhibited by watermelon root exudates and the degree of inhibition increased with increasing concentration of exudates. Root exudates had inhibitory effects throughout the experiment and these were most pronounced during the period 41-50 days after transplanting. Inhibitory effects of various plant tissues were demonstrated using the bioassay tests. Frulic acid was the dominant component found using HPLC and the amounts of allelochemicals found in the plant extracts were correlated with the bioassay results using the Petri dish test. The results indicate that the allelopathic potential of watermelon may play an important role in the phenomenon referred to as 'soil sickness'. #

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Section: Continuous Root Exudates Cultivation and Trapping Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Allelopathic potential of watermelon tissues and root exudates

Hao

Wang

Christie

et al. 2007

Scientia Horticulturae

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“…Soil sickness is usually found in agricultural crops, especially in medicinal plant (Zhang et al, 2005;He et al, 2009;Yin et al, 2009). Soil sickness may be attributed to autotoxicity, soil microflora imbalance and changes in soil physiochemical properties (Young, 1984;Yu and Matsui, 1994). Previous studies report that build-up of plant pathogens is one of the major causes in soil sickness in Cistus ladanifer (Hassan et al, 1989), peach (Benizri et al, 2005), cucumber (Yao et al, 2006), Rehmannia glutinosa (Chen et al, 2007), Liriope (Zhao et al, 2010), while autotoxicity has been reported to be one of the major causes in soil sickness in cucurbit crops (Yu et al, 2000), alfalfa (Segiun et al, 2002), Cistus ladanifer (Alías et al, 2006), cucumber (Yao et al, 2006) and wheat (Wu et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effect of Intercropping of Angelica sinensis with Garlic on its Growth and Rhizosphere Microflora

Zhang¹,

Lang²,

Zhang³

et al. 2015

IJAB

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Aims and Methods A pot experiment was carried out to determine the effect of Angelica sinensis intercropped with garlic on A. sinensis growth and soil microbial communities in rhizosphere soil of A. sinensis under the scheme of A. sinensis intercropped with garlic. Results Soil microbial community was changed and bacteria functional group diversity was increased, and A. sinensis growth was improved when A. sinensis intercropped with garlic under the continuous cropping condition. Also, it shows that intercropping significantly increased root dry weight, and much less substantially shoot dry weight and plant height. Relative to the control, the activity of superoxide dismutase, peroxidase and catalase was increased by 80.00, 243.41 and 37.13%, respectively, but the content of malondialdehyde was decreased by 11.67%, along with a 70.13% yield improvement of A. sinensis, and 50.00% and 10.20% essential oil and alcohol-soluble extract increasing, respectively. The result also showed that the population of bacteria, aerobic cellulose-decomposing bacteria, organic phosphorus-solubilizing bacteria, inorganic phosphorus-solubilizing bacteria and potassium-solubilizing bacteria in rhizosphere soil were promoted in intercropping in vigorous growth stage. The abundance of aerobic cellulose-decomposing bacteria, organic phosphorussolubilizing bacteria and potassium-solubilizing bacteria in intercropping soils changed at the rootstock thickening. Although the total population of functional groups in intercropping A. sinensis rhizosphere soils was lower than in monocroping system, community diversity and evenness increased and dominance concentration decreased. Conclusions Intercropping A. sinensis with garlic can alleviate the soil sickness of A. sinensis.

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“…The physiological alterations caused by allelochemicals are often concentration dependent, and for many phenolic compounds the range of bioactivity is between 0.1 and 1 mmol/L (Piotrowski et al 2008). The release rate of phenolic compounds from cucumber roots is about 0.01 μmol/day/plant in hydroponic solution (Yu and Matsui 1994). SA content in soils from long-term monocultured cucumber system was about 0.13 μmol/g soil .…”

Section: Discussionmentioning

confidence: 99%

Syringic acid inhibited cucumber seedling growth and changed rhizosphere microbial communities

Zhou¹,

Wu²,

Xiang³

2014

PLANT SOIL ENVIRON

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Phenolic compounds enter soil as a result of root exudation and plant residue decomposition, but their impacts on soil microbial communities are poorly understood. In this experiment, effects of syringic acid on cucumber rhizosphere microbial communities were evaluated. Rhizosphere bacterial and fungal community structures and abundances were analyzed with PCR-denaturing gradient gel electrophoresis (DGGE) and quantitative PCR, respectively. Results showed that syringic acid inhibited cucumber seedling growth at concentrations of 0.05 to 0.2 μmol/g soil, and increased rhizosphere soil dehydrogenase activity, microbial biomass carbon content, bacterial 16S rRNA gene and fungal ITS rRNA gene densities, and decreased the bacteria-to-fungi ratio at concentrations of 0.02 to 0.2 μmol/g soil. Syringic acid also changed rhizosphere bacterial and fungal community structures: it decreased the richness, evenness, and diversity indices of rhizosphere bacterial community but had no significant influences on that of fungal community, indicating that syringic acid had different influence on bacterial and fungal communities. Taken together, these results showed that syringic acid inhibited cucumber growth and altered rhizosphere microbial communities, suggesting that syringic acid plays some role in the communication between plants and soil microorganisms.

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Phytotoxic substances in root exudates of cucumber (Cucumis sativus L.)

Cited by 184 publications

References 21 publications

Allelopathic potential of watermelon tissues and root exudates

Allelopathic potential of watermelon tissues and root exudates

Effect of Intercropping of Angelica sinensis with Garlic on its Growth and Rhizosphere Microflora

Syringic acid inhibited cucumber seedling growth and changed rhizosphere microbial communities

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