Abstract
Abstract To determine whether grape ( Vitis sp.) replant problem might be an example of autotoxicity, soil samples from fields that had or had not been replanted with grape cuttings were extracted with a neutral solution of ethylenediaminetetraacetic acid (EDTA) and by leaching with half-strength Hoagland's solution. Rooted grape cuttings growing in sand also were leached. Fractions of the leachates and extracts were assayed for toxicity using lettuce seedlings. Grape roots and replant soil yielded a toxic substance not present, or possibly present only at low levels, in non-replant soil. The replant soil extract inhibited phenylalanine ammonia-lyase activity in grape roots more than did the non-replant soil extract. The toxic substance in the replant soil extract was partially purified and a 1 H nuclear magnetic resonance (NMR) spectrum taken, but the substance has not been identified. Thus, grape roots appear to be the source of at least one compound that is toxic to plants and accumulates in the soil in which grapes are grown.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
A toxic substance was present in grape roots and replant soil but not, or only at low levels, in non-replant soil.
Verbatim
e0“Grape roots and replant soil yielded a toxic substance not present, or possibly present only at low levels, in non-replant soil”
Claim · model-written summary
The replant soil extract inhibited phenylalanine ammonia-lyase activity in grape roots more than the non-replant soil extract did.
Verbatim
e1“The replant soil extract inhibited phenylalanine ammonia-lyase activity in grape roots more than did the non-replant soil extract”
Claim · model-written summary
The toxic substance was partially purified and an NMR spectrum was taken, but the substance has not been identified.
Verbatim
e0“Grape roots and replant soil yielded a toxic substance not present, or possibly present only at low levels, in non-replant soil”
e2“The toxic substance in the replant soil extract was partially purified and a 1 H nuclear magnetic resonance (NMR) spectrum taken, but the substance has not been identified”
Claim · model-written summary
Grape roots appear to be the source of at least one compound that is toxic to plants and accumulates in the soil where grapes are grown.
Verbatim
e3“grape roots appear to be the source of at least one compound that is toxic to plants and accumulates in the soil in which grapes are grown”
The same questions in other papers
botanical · physiology: antioxidant enzymes · VitisPositive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.