Abstract
1. Plants of annual morning-glory, Ipomoea lacunosa L., grown in a green-house under conditions favoring vigorous vegetative growth and seed production, were sprayed with an aqueous mixture containing 1000 p.p.m. of 2,4-dichlorophenoxyacetic acid and 0.6% Carbowax 1500. Other plants of morning-glory grown under conditions of photoperiod and soil fertility less favorable for vegetative growth were treated in a similar way. 2. No apparent growth occurred, either in those treated plants that were in a vigorous vegetative condition or in those that were relatively dormant at the time of treatment. Following treatment, the total dry weight of untreated plants increased while that of the sprayed ones decreased. Neither those that were vegetative nor the dormant ones showed external evidence of gall formation or root initiation as the result of treatment. In the sprayed plants, necrosis was first evident in the flower buds, and none of these developed mature seeds. Both the vegetative and the nonvegetative plants died within 3 weeks following treatment. 3. Readily available carbohydrates (sugars, starch, and dextrin) were essentially depleted within a period of 3 weeks in plants that were growing vigorously, and also in plants that were relatively dormant when treated. Carbohydrate reserves (starch and dextrin) were rapidly depleted in the flower buds, and also in the roots, of the sprayed plants, a response of significance in connection with the use of 2,4-dichlorophenoxyacetic acid in the control of weeds. 4. Sugars in treated plants at first increased above the amount in the untreated ones, then decreased, and they were nearly depleted during the second and third week after treatment.
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Claims 10
Claim · model-written summary
Sprayed plants showed no apparent growth.
Not reportedTaxonComparator
Verbatim
e0“No apparent growth occurred, either in those treated plants that were in a vigorous vegetative condition or in those that were relatively dormant at the time of treatment”
Claim · model-written summary
Sprayed plants lost total dry weight while untreated plants gained it.
Not reportedTaxon
Verbatim
e0“Following treatment, the total dry weight of untreated plants increased while that of the sprayed ones decreased”
Claim · model-written summary
Treatment produced no external gall formation or root initiation.
Not reportedTaxonComparatorDirection
Verbatim
e0“Neither those that were vegetative nor the dormant ones showed external evidence of gall formation or root initiation as the result of treatment”
Claim · model-written summary
Necrosis first appeared in sprayed flower buds.
Not reportedTaxon
Verbatim
e0“In the sprayed plants, necrosis was first evident in the flower buds”
Claim · model-written summary
Sprayed flower buds produced no mature seeds.
- Outcome
- mature seedse0
Not reportedTaxonTreatmentComparatorDirection
Verbatim
e0“none of these developed mature seeds”
Claim · model-written summary
Both vegetative and nonvegetative treated plants died within three weeks.
Not reportedTaxon
Verbatim
e0“Both the vegetative and the nonvegetative plants died within 3 weeks following treatment”
Claim · model-written summary
Readily available carbohydrates were essentially depleted within three weeks in vigorous and relatively dormant treated plants.
Not reportedTaxonComparator
Verbatim
e0“Readily available carbohydrates (sugars, starch, and dextrin) were essentially depleted within a period of 3 weeks in plants that were growing vigorously, and also in plants that were relatively dormant when treated”
Claim · model-written summary
Starch and dextrin reserves were rapidly depleted in sprayed flower buds and roots.
Not reportedTaxonComparator
Verbatim
e0“Carbohydrate reserves (starch and dextrin) were rapidly depleted in the flower buds, and also in the roots, of the sprayed plants”
Claim · model-written summary
Sugars initially increased above untreated plants.
Not reportedTaxon
Verbatim
e0“Sugars in treated plants at first increased above the amount in the untreated ones”
Claim · model-written summary
Sugars later decreased and were nearly depleted in weeks two and three.
Not reportedTaxon
Verbatim
e0“then decreased, and they were nearly depleted during the second and third week after treatment”