Search Results

You are looking at 1 - 10 of 647 items for :

  • " Petunia " x
  • Refine by Access: All x
Clear All
Free access

Janne Autio, Irma Voipio, and Taina Koivunen

Seedlings of aster [Callistephus chinensis (L.) Nees], dusty miller [Senecio bicolor (Willd.) Tod.], and petunia (Petunia Juss.) were subjected to brushing with burlap in two experiments. The spring experiment tested the daily duration of brushing (60, 120, or 180 minutes per day) and the autumn experiment tested the stimulus of brushing (brushing for 2 hours with single-layer, double-layer, or triple-layer burlap). Brushing was done with slow-moving apparatus. The increase in daily brushing duration led to a greater reduction of growth, although differences between the species were noted. Aster showed a growth reduction after 20 days of treatment, whereas dusty miller and petunia took longer to respond. Aster and petunia responded significantly even to the shortest daily brushing duration, whereas dusty miller needed 2 hours per day to achieve any significant growth reduction. Increasing the brushing stimulus resulted in injuries to aster leaves in autumn. Brushing with double-layer burlap caused maximum growth reductions in all the species. Brushing most clearly reduced the growth of dusty miller and petunia in autumn, but aster showed similar growth reductions in spring and autumn.

Open access

Jennifer K. Boldt and James E. Altland

or more genotypes were found to contain appreciable quantities of Si, studies could investigate whether the accumulation provides protection and offers growers a nonpesticide alternative to include in their pest management rotation. Petunia ( Petunia

Free access

Aaron E. Walworth and Ryan M. Warner

capable of acclimation ( Chen and Li, 1980 ; Pino et al., 2008 ). Petunia hybrida does cold acclimate ( Pennycooke et al., 2003 ; Yelenosky and Guy, 1989 ), whereas cold acclimation ability of other Petunia spp. is currently unknown. Cold acclimation

Free access

M. Khademi, D. S. Koranski, and P. T. Karlovich

NaCl, KNO3 (0.3, 0.4, 0.5M), KH2P O4 (0.4, 0.5, 0.6M), and PEG 8000 (320 to 370 g/L with the increment of 10g/L) were used for priming Petunia `Ultra White' seeds for three to six days. Seeds were germinated in a growth chamber at 25C. Germination was recorded for seven days and the number of acceptable seedlings (seedlings with open cotyledon and normal root) was counted on the day seven. KH2P O4 at 0.6M was the best salt treatment. Rate of germination was improved by salt priming but the number of acceptable seedlings was lower than the control. Addition of GA (5 ppm) to the salt treatment was not effective. More abnormal seedlings were observed when seeds were primed in aerated salt solutions than when primed in petri dishes. Aerated PEG at 325 g/L for three days and 365 g/L for six days gave the best results. Priming in PEG improved percent of germination, rate of germination, and number of acceptable seedling as compared to control. Primed seeds lost some of the advantages of priming during 24hr air drying (22C), however quality was maintained when dried at 10C. Drying primed seed in 80% R.H. was not effective.

Free access

M. Khademi, D. S. Koranski, and P. T. Karlovich

NaCl, KNO3 (0.3, 0.4, 0.5M), KH2P O4 (0.4, 0.5, 0.6M), and PEG 8000 (320 to 370 g/L with the increment of 10g/L) were used for priming Petunia `Ultra White' seeds for three to six days. Seeds were germinated in a growth chamber at 25C. Germination was recorded for seven days and the number of acceptable seedlings (seedlings with open cotyledon and normal root) was counted on the day seven. KH2P O4 at 0.6M was the best salt treatment. Rate of germination was improved by salt priming but the number of acceptable seedlings was lower than the control. Addition of GA (5 ppm) to the salt treatment was not effective. More abnormal seedlings were observed when seeds were primed in aerated salt solutions than when primed in petri dishes. Aerated PEG at 325 g/L for three days and 365 g/L for six days gave the best results. Priming in PEG improved percent of germination, rate of germination, and number of acceptable seedling as compared to control. Primed seeds lost some of the advantages of priming during 24hr air drying (22C), however quality was maintained when dried at 10C. Drying primed seed in 80% R.H. was not effective.

Open access

Brian J. Schutte, Abdur Rashid, Israel Marquez, Erik A. Lehnhoff, and Leslie L. Beck

( Cyperus esculentus ). Since ≈2015, a weed species in the nightshade family (Solanaceae)—seaside petunia [ Calibrachoa parviflora (synonym Petunia parviflora )]—has become increasingly abundant in New Mexico onion fields. Seaside petunia ( Fig. 1 ) was

Full access

Yuqi Li and Neil S. Mattson

substrate [MM; Sun Gro Horticulture, Agawam, MA ( Atiyeh et al., 2001 )]. Danaher et al. (2013) evaluated petunia growth response to amending a commercial potting mix (Fafard 3B; Conrad Fafard, Agawam, MA) with different amounts of dewatered aquaculture

Free access

Laura J. Chapin, Youyoun Moon, and Michelle L. Jones

petal senescence–associated genes (SAGs) ( Jones et al., 2009 ), no studies to date have investigated the role of metacaspase proteases in petal senescence. This article presents the cloning and characterization of a type I metacaspase from petunia

Free access

Glenn B. Fain, Charles H. Gilliam, Jeff L. Sibley, Cheryl R. Boyer, and Anthony L. Witcher

concern comes about as a result of previous studies comparing 100% WholeTree with a 8 peatmoss : 1 vermiculite : 1 perlite (by volume) substrate ( Fain et al., 2008 ) in production of marigold and petunia. With identical fertilizer programs, plants in

Open access

Katherine Bennett, Mary Vargo, Guido Schnabel, and James E. Faust

Botrytis cinerea is a ubiquitous plant pathogen that infects bedding plants during greenhouse production, resulting in latent infections that appear in the postharvest shipping environment. On arrival at the retail location, petunias frequently