Response of radish to multiple stresses

Abstract

SUMMARYExperiments were conducted to determine what impact ozone (Og) and/or soil moisture deficit had on the growth and development of radish plants. Plants oi Raphanus sativus L. Cherry Belle and Raphanus sativus x raphanistrum (wild type) grown in modified open-top chambers, were treated with O.j and/or subjected to reduced soil moisture throughout growth and development. Experiments were performed in the spring and autumn of 1989. Plants of both genotypes exhibited a more adverse response to soil moisture deficit in the spring experiment and to O3 in the autumn experiment. The higher light intensity and temperature prevailing in the spring, in contrast to those during the autumn, were thought to favour a negative impact of reduced soil moisture. The spring conditions fostered high relative growth rate and more rapid water loss by the shoot on both a relative and absolute basis. These same conditions may have placed the plants in a physiological state which minimized toxieity by O,. Carbon partitioning in the spring favoured reproduction while the autumn carbon was preferentially partitioned to the hypocotyl and foliage for Cherry Belle and Wild Type, respectively. The importance of these partitioning differences between genotypes was explored as it related to injurious and compensatory responses to the two stresses. Since the plants were not equally sensitive to reduced soil moisture and Og, in the same experiments, inteiactions were frequently absent. When interactions occurred, O, injury was reduced in plants also grown in soil with reduced moisture content.

Radish Planting Date and Nitrogen Rate for Cover Crop Production and the Impact on Corn Yields in Upstate Missouri

“…In growth chambers, radishes exhibited a more adverse response to soil moisture deficits in the spring than fall. Soil moisture reduced CO 2 fixation and thus subsequent biomass accumulation (Pell et al, 1993). The authors hypothesize that spring conditions led to a large relative growth rate and faster water loss by the shoot, thus favoring a negative impact of reduced soil moisture which was more evident in the spring.…”

“…Radishes' planting date influences crop production (Pell at al., 1993;Pandey et al, 2009;Alam et al, 2010;Ebrahimi et al, 2013), including the vegetative and reproductive growth periods as well as the balance between them, which affects yield (Ebrahimi et al, 2013). An appropriate sowing date helps reduce damage from cold, heat, pests, diseases, and weeds.…”

“…Timing of planting may be significant due to available light. Light treatments affect radish growth and yield (Schmitt et al, 1986;Pell et al, 1993). In a pot experiment, radish growth rates and mass decreased with decreasing light (Schmitt et al, 1986), and photoperiod influenced biomass partitioning (Pell et al, 1993).…”

“…Light treatments affect radish growth and yield (Schmitt et al, 1986;Pell et al, 1993). In a pot experiment, radish growth rates and mass decreased with decreasing light (Schmitt et al, 1986), and photoperiod influenced biomass partitioning (Pell et al, 1993). In addition to the amount of light available, the season may impact radish production (Pell at al., 1993).…”

“…In a pot experiment, radish growth rates and mass decreased with decreasing light (Schmitt et al, 1986), and photoperiod influenced biomass partitioning (Pell et al, 1993). In addition to the amount of light available, the season may impact radish production (Pell at al., 1993). In growth chambers, radishes exhibited a more adverse response to soil moisture deficits in the spring than fall.…”