Phytotoxic Effects of a Short-Chain Fatty Acid On Seed Germination and Root Length Of<i>Cucumis Sativus</i>cv.‘Poinset’

Shiralipour, Aziz; McConnell, Dennis B.; Smith, Wayne H.

doi:10.1080/1065657x.1997.10701873

Cited by 26 publications

(10 citation statements)

References 5 publications

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“…the composting security was related to the organic acid and phenolic substance contents in the compost (Chanyasak et al, 1982;Devleeschauwer et al, 1981;Shiralipour et al, 1997). The changes in organic acids and phenolic substances extracted from the compost were consistent with the germination indices and composting temperature reported previously (Zhu et al, 2012).…”

Section: Sample Analysis and Component Identificationsupporting

confidence: 69%

Analysis of volatile organic compounds in compost samples: A potential tool to determine appropriate composting time

et al. 2016

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Section: Sample Analysis and Component Identificationsupporting

confidence: 69%

Analysis of volatile organic compounds in compost samples: A potential tool to determine appropriate composting time

et al. 2016

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“…Production of water‐soluble organic phytotoxins such as short‐chain fatty acids (e.g., acetic acid), during composting has been reported (Kirchmann and Widen, 1994). Shiralipour et al (1997) found an inhibitory effect of acetic acid on the germination of cucumber ( Cucumis sativus L.). Ozores‐Hampton et al (1999) found that germination of ivyleaf morning glory ( Ipomoea hederacea L.), barnyard grass ( Echinochloa crus‐galli L.), and common purslane ( Portulaca oleracea L.) was delayed and decreased by extracts from 3‐d‐, 4‐wk‐, and 8‐wk‐old composts as compared with a mature compost extract (1 yr old).…”

Section: Discussionmentioning

confidence: 99%

Weed Seed Viability in Composted Beef Cattle Feedlot Manure

2003

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Manure composting has gained increased acceptance by the beef cattle (Bos taurus) feedlot industry in southern Alberta, Canada. Unlike fresh manure, compost is often promoted as being "weed-free." Studies were conducted with five weed species in 1997 and thirteen in 1999 to examine the effect of feedlot manure composting on weed seed viability. Weed seeds were buried in open-air compost windrows and recovered at various times during the thermophilic phase of composting. Windrow temperature and water contents were also measured. Germinability was zero for all composted weed seeds at all sampling times in 1997. However, some seeds remained viable (positive tetrazolium test denoting respiration) on Day 70. In 1999, only one of the thirteen species retained germinability on Day 21 and only two species had respiring seeds on Day 42. Time-viability relationships during composting were defined by exponential decay models. Lethal temperatures to eliminate viability was species-dependent. In 1999, four weed species were killed in the initial 7 d of composting at a lethal temperature of 39 degrees C while temperatures of > 60 degrees C were required for two species. Regression analysis on weed seed viability versus windrow temperature resulted in significant R2 values, which showed that only 17 to 29% of the variation in viability was accounted for by temperature. The lack of definitive relationships between temperature and weed seed viability demonstrated that factors other than temperature may play a role in eliminating weed seeds during composting.

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“…(1981) showed that short-chain volatile f a t t y acids, primarily acetic acid, were responsible for the phytotoxic effects of immature compost. IrAibitory effects of acetic acid on seed germination and root length of cucumber were determined by Shiralipour et al (1997). In our study the GI was increased from 31 percent after six days of composting to 92 percent after 126 days (Figure 1).…”

Section: Germination Lrtdexmentioning

confidence: 72%

A Novel Method For Determining Phytotoxicity In Composts

Helfrich

Chefetz

Hadar

et al. 1998

Compost Science & Utilization

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Phytotoxicity of compost in various degrees of maturity has been extensively reported. It is usually determined by a seed germination index assay or by plant growth tests. The main deficiency of these tests is the length of time required for their performance. Therefore, we tested new biosensor techniques in this study based on oxygen consumption and fluorescence measurements of isolated freshly suspended or lyophilized chloroplast thylakoids (Vicinjdm L.). These methods were compared with traditional phytotoxicity tests. The new systems proved to be suitable for evalLiating the function of the photosynthetic electron transport (PET) between photosystem I1 and photosystem I. When PET was inhibited by phytotoxic substances, fluorescence increased whereas oxygen consumption decreased. Germination index data as well as plant growth bioassay data exhibited high correlations with data obtained from the novel biosensor techniques. Thus, we propose application of these methodologies based on freshly isolated or lyophilized chloroplast membranes, as rapid and sensitive tests for compost phytotoxicity.

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Phytotoxic Effects of a Short-Chain Fatty Acid On Seed Germination and Root Length OfCucumis Sativuscv.‘Poinset’

Cited by 26 publications

References 5 publications

Analysis of volatile organic compounds in compost samples: A potential tool to determine appropriate composting time

Analysis of volatile organic compounds in compost samples: A potential tool to determine appropriate composting time

Weed Seed Viability in Composted Beef Cattle Feedlot Manure

A Novel Method For Determining Phytotoxicity In Composts

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