this study were to compare the relative salt tolerance of the previously described 10 ornamental taxa by quantifying the growth, morphological, and physiological responses to a range of salinity in a greenhouse study. Materials and Methods Plant
). Tatarian dogwood is a popular ornamental shrub with white fruits, creamy-white flowers, and red stems in fall through late winter ( Dirr, 2009 ). It is widely used in residential landscape, public parks, and botanical gardens. The morphological and
In 1992 a petunia breeding program was initiated at the University of Georgia. The objective of this particular study was to screen an extensive collection of petunia germplasm for variability of numerous vegetative and floral characters in order to determine sources and extent of morphological variability existing in petunia.
One hundred twenty-two petunia cultivars and accessions including 83 current commercial F1 cultivars, 24 older cultivars, 3 accessions of the putative progenitor species of Petunia hybrida, 1 open-pollinated reseeding line, and 11 inbred lines were measured for 9 vegetative and floral characters. Genotypes include selections from all countries with major petunia breeding programs. Plants were grown in the greenhouse and measurements taken at time of first bloom.
Analysis of variance revealed highly significant variation among genotypes for each of the 9 characters measured. Cluster analysis was utilized to examine relationships among genotypes and to identify unique genotypes that may be useful in the UGA petunia breeding program.
Melon is an important horticultural crop across the world, and the fruits of different cultivars show considerable intraspecific diversity. This diversity is exemplified by the morphological variation in fruit characteristics such as size, color
morphological characteristics such as stomata density and leaf curvature influence infection of P. belbahrii in different Ocimum species, and if so, could be effective visual markers for screening in plant breeding. The large morphological variations in the
evaluate those valuable landrace populations for better use and proper conservation before they disappear. Fig. 2. Representative pictures of plants from Beichuan Taizicha ( A – D ) and Nanjiang Dayecha ( E – G ) investigated in this study. Morphological
The histology and morphology of developing asparagus Asparagus officinalis L.) somatic embryos arising in callus cultures were examined and contrasted with that documented for zygotic embryos. Histological sections of lateral bud-derived callus cultured for 2 weeks on embryo induction medium consisting of Murashige and Skoog salts and vitamins (MS) with 1.5 mg NAA/liter and 0.1 mg kinetin/liter indicated the formation of distinct groups of embryogenic cells. At 4 weeks, the callus was comprised of embryos in the early and late globular stages and a few bipolar embryos. Within 2 weeks on embryo development medium consisting of MS with 0.05 mg NAA/liter and 0.1 mg kinetin/liter, the globular embryos developed a bipolar shape having an expanded upper region that formed the cotyledon and a smaller region that formed the radicle. Within 4 to 6 weeks on this latter medium, each mature bipolar embryo was opaque and had a large cotyledon, a distinct shoot apex at the cotyledon-hypocotyl junction, and vascular connections between the radicle, shoot apex, and cotyledon. Many mature somatic embryos resembled the asparagus zygotic embryos in having a crescent shape, whereas others had a short but wide cotyledon. Both somatic embryo types converted to plantlets at equal rates. Chemical names used: N- (2-furanylmethyl)-1 H -purin-6-amine (kinetin); 1-naphthaleneacetic acid (NAA).
stress to the cuticle layer within the species. Data are also lacking to determine if morphological or compositional changes in the cuticle from acute moisture stress influence foliar N uptake and if added surfactant can amend those changes. The
HBs alter both light quantity and quality ( Faust et al., 2014 ; Llewellyn et al., 2013 ), the extent to which altered light quality beneath HBs contributes to changes in plant morphology is unknown. Research into the factors of the light environment
in grass stems and leaves is reinforced by their morphological traits. Of all such traits, cell wall components are of the greatest importance, especially in the number of sclerenchyma fibers. Lignin and cellulose contents ensure structural stability