accumulation of pak choi leaf area can reflect the level of yield, it is an important trait that concerns cultivators and producers. Plant growth analysis has developed as the use of computers and control technology has advanced. This technology is a more
variety of traits, such as altered leaf color and shape, dwarfism ranging from subtle to extreme, and changes in flowering time. Some other specific traits were also found to be associated with the loss or gain of some chromosomes. Therefore, aneuploid
, 1963 ) and observed with a JEM-1010 transmission electron microscope at 90 KV. Histochemistry observation. The essential oil present in the oil structures was detected by Sudan III using hand-cut transverse sections of fresh leaf and rhizome. Sections
The ability to monitor plant nutrient status of high value horticultural crops and to adjust seasonal nutrient supply via fertilizer application has economic and environmental benefits. Recent technological advances may enable growers and field consultants to conduct this type of monitoring nondestructively in the future. Using the perennial crop apple (Malus domestica) and the annual crop potato (Solanum tuberosum), a hand-held leaf reflectance meter was used to evaluate leaf nitrogen (N) status throughout the growing season. In potato, this meter showed good correlation with leaf blade N content. Both time of day and time of season influenced leaf meter measurement, but leaf position did not. In apple, three different leaf meters were compared: the leaf spectral reflectance meter and two leaf greenness meters. Correlation with both N rate and leaf N content were strongest for the leaf reflectance meter early in the season but nonsignificant late in the season, whereas the leaf greenness meters gave weak but significant correlations throughout the growing season. The tapering off of leaf reflectance values found with the hand-held meter is consistent with normalized difference vegetation index (NDVI) values calculated from satellite images from the same plots. Overall, the use of leaf spectral reflectance shows promise as a tool for nondestructive monitoring of plant leaf status and would enable multiple georeferenced measurements throughout a field for differential N management.
). Within the genus Capsicum , there is an abundance of genetic diversity for plant habit, fruit and leaf characteristics to meet the demands for creating new types. In Capsicum , over 290 genes have been identified for unique horticultural
initial fruit set increased with increasing leaf area. By girdling and removing different numbers of fruit and leaves from branches, Roe et al. (1997) reported that developing fruit of ‘Tai So’ depended primarily on current CO 2 assimilation from leaves
their attractive and diverse leaf forms, colors, and textures, potted foliage plant displays are recognized for enhancing human health, well-being, and productivity ( Fjeld et al., 1998 ). The marketability of foliage plants is frequently limited by
signaling. Earlier studies have shown that strawberry is able to adjust osmotically to soil drying ( Renquist et al., 1982 ; Save et al., 1993 ) and physiological parameters such as photosynthesis and transpiration do not decrease until the leaf water
Cultivated caladium is an ornamental aroid produced for container or hanging basket plants or grown in landscapes for their variably shaped, colorful foliage. The ornamental value of caladium plants, to a great extent, depends on their leaf
Abstract
Hybrid geraniums (Pelargonium × hortorum Bailey) cv. Sooner Red were grown at temperatures ranging from 10–32°C and at various quantum flux densities. The time to visible bud stage (<0.5 cm diameter) was negatively correlated to quantum flux density at a given temperature. The time required from visible bud to flower stage was negatively correlated with temperature while light had no effect. Leaf thickness, number of palisade layers, and specific leaf weight were negatively correlated with temperature, and specific leaf weight was positively correlated with quantum flux density at a given temperature. Net photosynthetic rate ranged from 5–38 mg CO2 dm-2hr-1 for temperatures of 10-37° and was optimum at 20-32°. The Q10 of respiration for hybrid geranium leaves was about 2.2.