Die Permeabilität der Zellwand

Brauner, L.

doi:10.1007/978-3-642-94676-9_16

Cited by 3 publications

(3 citation statements)

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“…However, if water uptake influences development of absorptive sites by causing structural changes in some seed food reserves, such as in proteins, then uptake of herbicides would continue past the time of maximum water uptake, and would not be truly independent of water uptake. Herbi cide absorption also might occur at other absorptive sites or be influenced by seed coat and cell membrane proper ties (2). For example, 50% of total water uptake was completed in 2 hr, but herbicide uptake ranged from 4 to 37% (Table 1).…”

Section: Discussionmentioning

confidence: 99%

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Uptake of Herbicides by Soybean Seed

Rieder¹,

Buchholtz

Kust

1970

Weed sci.

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The uptake of herbicides by soybean (Glycine max(L.) Merr.) seed from14C-labeled aqueous solutions of 3-amino-2,5-dichlorobenzoic acid (amiben), 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine), 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (linuron),S-ethyl dipropylthiocarbamate (EPTC), and isopropylm-chlorocarbanilate (chlorpropham) was determined by measuring reduction in the concentration of the herbicides in the soaking solution. There was a direct proportional relationship between uptake and concentration. Raising the temperature from 10 to 30 C increased uptake of herbicides. The greatest increase occurred from 10 to 20 C. After 48 hr at 30 C, 39% of the amiben, 61% of the atrazine, 65% of the EPTC, 83% of the linuron, and 92% of the chlorpropham in the original solution was absorbed by the seed. Uptake rates were similar in living and dead seed. Uptake was reversible with amiben but not with chlorpropham. Absorption of herbicides could not be associated with absorption of water except during the first few hours when the seed were rapidly imbibing water. Ratios of seed to solution herbicide concentrations all exceeded 1:1 after 48 hr and with chlorpropham, reached 68:1. The uptake of herbicides by seed was largely a physical process that required seed hydration, but herbicide uptake continued after water uptake ceased.

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Section: Discussionmentioning

confidence: 99%

“…Very little was translocated from the seed during germination and development of a plant. Isopropyl m-chlorocarbanilate (chlorpropham) was absorbed independently of and faster than water by castor bean (Ricinis communis L.), corn, and soybean seed with a similar pattern of uptake in both living and dead seed (2).…”

Section: Introductionmentioning

confidence: 99%