Effect of high temperature and recovery from stress on crop–weed interaction

Abstract

Biotic and abiotic stresses, either individually or in combination, may affect soybean growth and development negatively, besides competitiveness with weeds. This study aimed at evaluating the effect of heat stress and plant recovery on crop-weed interaction by analyzing growth variables. Experiments were set up as replacement series of soybean with slender amaranth. Treatments followed a factorial scheme, which was composed of heat stress [high temperature (38/22 ± 2 °C) against the control (28/22 ± 2 ºC)] and of proportions of soybean and slender amaranth, i.e., 100:0 (pure stand of soybean), 50:50 and 0:100 (pure stand of slender amaranth). After being submitted to high temperatures, plants were analyzed in terms of their recovery from heat stress. Variables under evaluation were height, leaf area and shoot dry weight. Results led to the conclusion that the weed shows more competitiveness than soybean, regardless of the heat stress. Interspecific competition for soybean and intraspecific competition for slender amaranth influence their height, leaf area and shoot dry weight negatively, while high temperature affects slender amaranth positively.

High interspecific competitiveness of the invasive plant Xanthium italicum Moretti severely reduces the yield and quality of Carthamus tinctorius L.

“…Competition commonly exists in plant communities. When plants with similar niches coexist, they often compete for limited environment resources such as soil moisture, mineral nutrition, and light 21 . Both X. italicum and Sa ower are shallow-rooted and sunny annual herbs of the Compositae family, with similar niches, so there is a potential interspeci c competition between them.…”

Integrated Weed Management for Sustainable Agriculture

“…This will help to understand which control strategies should be applied and at which cost. Although the most commonly known effects are those that either directly affect the crop through competition are the increase in production costs and/or decrease the quality of the crop, the lesser effects referring to animal or human health should also be considered (Ruchel et al 2020). In agro-ecosystems, weeds caused severe damage to the crop plants that may rise upto 93% in the productivity loss.…”

“…In a particular crop field, several weeds might exist but each exhibit different competitive ability. It also depends upon the crop species, for example; in soybean field, weed such as Amaranthus viridis L. is morphological and physiological similar and thus give tough time to the soybean and increase the competition for resources (Ruchel et al 2020).…”

Temperature Changes Affected Spring Phenology and Fruit Quality of Apples Grown in High-Latitude Region of South Korea

“…Climate change has led to abnormal weather patterns worldwide, including increased mean temperatures and extreme temperature fluctuations, which are also evident in Korea [5,6]. Rising temperatures have been known to induce heat stress in major crop species, affecting crucial growth stages, reducing photosynthesis, and hindering overall plant development [7]. Furthermore, higher temperatures contribute to the proliferation of pests and diseases, leading to decreased crop quality and productivity [8].…”