Identifying Drought-Tolerant Impatiens Genotypes by Using Water Stress Treatment

Abstract

The drought-tolerant Impatiens genotypes are known for their resistance to limited or stressed water. The study aimed to identify drought-tolerance of Impatiens clones. The experiment used a split-plot design replicated three times, with the water stress treatment as the main plot and Impatiens clones as subplots. The main plot consists of 100% and 60% of field capacity. The subplots consist of five Impatiens clones, 17.12; 12; 33.3; 40 B and Impatiens cv of Impala Agrihorti as a control. The results showed that 60% field capacity decreased morphological and physiological traits. Still, the drought-tolerant clones were less affected by the stress and produced more flowers than the others. The most drought-tolerant Impatiens was clone 12. The mechanism of drought tolerance Impatiens was by stomatal closure when the humidity in the growing medium was decreasing. The stomata closure did not significantly reduce the fresh and dry weight in drought-tolerant plants, but it affected the delay in flower initiation. The plant accumulated assimilate for plant height and diameter growth but is not sufficient for generative initiation. They assimilate in the vegetative phase and can be used as sources for flower formation, which show no significant decrease in the number of flowers. The study implies that the drought-tolerant Impatiens clones can be used as genotype sources for drought-tolerant or can be released as new varieties of Impatiens for landscape plants with the superiority in having drought tolerant.

Cocopeat Perlite Mixture as an Alternative for Rooted Cuttings Growth Medium of Impatiens hawkeri x platypetala in Indonesia

“…Environmental observations during the rooted cutting plant growth showed that the average temperature, relative humidity, and light intensity were 26.38 °C, 81.17% and 7,388 Lux respectively as shown in Table 1. According to a previous study, the Impatiens juvenile requires temperatures in the range of 21.50 to 26.50 °C (Shintiavira et al, 2023). This indicates that the Impatiens were provided with optimal conditions in this study for their growth and development.…”

“…Light intensity was measured above the plant canopy using a lux meter, while air temperature and humidity were recorded with a thermohygrometer. The measurements were carried out in the morning (09.00 a.m.), afternoon (12.00 p.m.) and evening (03.00 p.m.) (Shintiavira et al, 2023). Before planting, the pH values for the growth medium were determined by combining 10 g medium with 50 ml water, agitating for 30 minutes and leaving it standing for 24 hours.…”

Evaluation of Soil Retention Capabilities Using RETC Application in Various Paddy Field Management Systems in Purwantoro District, Indonesia

“…Water in the soil fills the existing soil pores. The more pores in the soil, the more water will be available; otherwise, the more pores in the soil will cause the soil's weight to be light [43]. The higher the value of soil content weight, the smaller the total soil pore space, so that the proportion of pore space for water is also less, while the smaller the value of soil content weight, the higher the value of soil pore space, so that the water capacity in the soil will also increase [44].…”