Influence of Four Weeds on Enzyme Components of Cabbage, Tomato, and Lettuce Seedlings

Retig, B.; Holm, L. G.

doi:10.1017/s0043174500051171

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…Such an internal system could also regulate endogenous auxin levels (Tomaszewski and Thiman, 1966). These hypotheses are consistent with reports associating peroxidases with growth potential and maturity (Lavee and Galston, 1968;Raa, 1973;Dejong, 1967) or with growth responses to treatments such as water stress, ethylene, auxin, coumarin, kinetin, and growth with other plants (Darbyshire, 1971;Ridge and Osborne, 1970;Jensen, 1955;Goren and Tomer, 1971;Gaspar and Xhaufflair, 1967;and, Retig and Holm, 1971). However, Manicol (1973), has noted the lack of a correlation between peroxidase isozyme patterns and genetic dwarfness in peas.…”

Section: Wall Boundsupporting

confidence: 84%

The Relationships Among Umbelliferone, Growth, and Peroxidase Levels in Cucumber Roots

Jankay

Muller

1976

American J of Botany

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Umbelliferone decreases the elongation rate and initiates a swelling response in cucumber roots. Associated with these growth effects are increases in peroxidase activity in water soluble, salt soluble, and wall bound fractions. The effect on elongation is reversible and is separated in time from the swelling response. Increased peroxidase levels appear after the elongation rate has been reduced but coincident with the swelling response. It is suggested that umbelliferone effects axial elongation and radial expansion through different mechanisms.

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Section: Wall Boundsupporting

confidence: 84%

The Relationships Among Umbelliferone, Growth, and Peroxidase Levels in Cucumber Roots

Jankay

Muller

1976

American J of Botany

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Experimental methodologies to evaluate allelopathic plant interactions

1983

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It is difficult to clearly and unambiguously demonstrate an allelopathic mechanism of plant interference. Several types of experimental methodologies such as the additive design, substitutive designs, and several types of plant yield-plant population functions are discussed in terms of their relative merits in terms of providing quantitative and qualitative information in the development of an empirical basis to describe a plant interaction. Additionally, several types of mathematical and graphical representations are presented using data from the velvetleaf (Abutilon theophrasti) and soybean (Glycine max) interaction. The design provides agronomically relevant information about crop yield losses but confounds the separate effects of population density and species proportion in mixtures. The replacement series design separates these two variables by maintaining a constant population of plants while varying the relative proportion of each species in mixtures. The replacement series diagram, relative yield, relative replacement rate, ratio diagram, a scaling test, and the regression of individual yield on the associate yield are discussed in terms of their utility in providing insights into a plant interaction. Individual plant yield-plant population functions such as the "Y-D" and "C-D" effects, the "3/2 power law of self-thinning," and the "Sakai" test provide a basis to compare plant yield per plant versus plant population responses. Several types of interactions are characterized with this methodology. None of these experimental designs will clearly demonstrate an allelopathic plant interaction alone, but they do provide high-inference experimental methodologies to develop an empirical foundation to describe accurately a plant interaction upon which more specific hypotheses can be developed.

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Interference between velvetleaf (Abutilon theophrasti Medic.) and soybean (Glycine max (L.) Merr.) I. Growth

Dekker

Meggitt

1983

Weed Research

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Summary Three field experiments were conduced to evaluate the effect of Abutilon theophrasti on dry matter, branching and flowering node, and seed production of soybean. Low populations (2.4–4.7 plants m−2) of the weed reduced soybean dry matter, flowering node and seed production. The effect was most pronounced on soybean seed yield, and less on flowering node and dry weight production. These effects were due to the presence of A. theophrasti with soybean, and not to changes in plant population. The effect on soybean branching node production was inconsistent between years.

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Influence of Four Weeds on Enzyme Components of Cabbage, Tomato, and Lettuce Seedlings

Cited by 3 publications

References 22 publications

The Relationships Among Umbelliferone, Growth, and Peroxidase Levels in Cucumber Roots

The Relationships Among Umbelliferone, Growth, and Peroxidase Levels in Cucumber Roots

Experimental methodologies to evaluate allelopathic plant interactions

Interference between velvetleaf (Abutilon theophrasti Medic.) and soybean (Glycine max (L.) Merr.) I. Growth

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