Search Results

You are looking at 101 - 110 of 5,394 items for :

  • All content x
Clear All
Open access

Yasser Ismail El-Nashar and Yaser Hassan Dewir

Germination is a critical event in the life cycle of a plant, and its timing largely predetermines seedling survival ( Chauhan et al., 2010 ). Both morphologically and physiologically, dormancy must be broken for germination to occur. Even under

Full access

Boris Andrés Bran Barrientos and Jong-Yi Fang

depth the influence of culture media and incubation conditions on the speed of seed germination and seedling development. For commercial and amateur growers, as well as future breeders of S. plicata , a tissue-culture protocol that ensures rapid

Free access

Genhua Niu, Pedro Osuna, Youping Sun, and Denise S. Rodriguez

sensitive during emergence and early seedling growth stages ( Maas, 1986 ; Rhoades, 1999 ). Once established, plants generally become increasingly tolerant during later growth stages. High salinity also induces a series of metabolic dysfunctions in plants

Full access

Haiyan Zhao, Haiying Liang, Yibing Chu, Congcong Sun, Ning Wei, Mengnan Yang, and Caixia Zheng

investigated the physiological responses of ginkgo seedlings to different doses of NaCl and evaluated their salt tolerance by tracking changes in Chl fluorescence and antioxidant and nonenzyme systems. Our goal was to understand the response mechanisms of

Free access

Bin Li, Ting Sang, Lizhong He, Jin Sun, Juan Li, and Shirong Guo

; Duan et al., 2008 ). Little is known about the effects of exogenous PAs on ethylene production in cucumber seedlings under salt stress. Therefore, we investigated whether an exogenous PA, Spd, could modify ethylene production and enhance growth and salt

Free access

Christian M. Baldwin, Eugene K. Blythe, A. Douglas Brede, Jami J. Mayer, and R. Golembiewski

cultivars at the seedling stage and after a late-season, cool-temperature application has received limited investigation. Although PRG is considered a fast-germinating cool-season species, ABG has greater seedling vigor ( Grime and Hunt, 1975 ). When

Free access

Gerardine Mukeshimana, Amy L. Lasley, Wayne H. Loescher, and James D. Kelly

yield. Intermittent drought stress during the seedling stage affects overall plant growth, whereas terminal drought significantly reduces bean seed yield and seed size during the critical reproductive period ( Singh, 2007 ). Seed quality is also

Free access

Bert Cregg*

Lilac (Syringa vulgaris L) seedlings are commonly grown in many seedling nurseries in Michigan. Typically seedlings are lifted in the fall and stored prior to shipment or stored by the customer. A major problem in field production of lilacs is that seedlings often retain their leaves late in the fall. If the leaves are not removed prior to storage or shipment, the seedlings will mold and deteriorate. Therefore, growers must spend additional labor to remove the leaves, often by hand. The goal of this research was to evaluate chemical alternatives to defoliate lilac seedlings in field nurseries. Two on-farm research trials were conducted in 2001 and 2003 in cooperation with a seedling grower in Saugatuck, MI. In Experiment 1, Florel (1/2 and ¼ dilution) and chelated copper (0.5% and 1% solution) were sprayed by and onto lilac in the seedling bed. Florel and chelated copper effectively reduced leaf area of lilac seedlings. Less than 20% of the initial leaf area remained on the 1% copper and ½ Florel-treated seedlings. The ½ Florel and 1% chelated copper completely defoliated 67% and 40% of the seedlings, respectively, whereas only 17% on the control seedlings lost all their leaves prior to lifting. Both levels of Florel and the 1% copper treatment reduced growth of seedlings after planting. In experiment 2, we applied chelated copper treatments at varying rates (0.25% and 0.5%) and times (1 application and 2 applications) using the cooperators' spray equipment. Repeated applications of chelated copper were more effective in reducing seedling leaf area than a single application at both concentrations tested.

Free access

Ariana P. Torres and Roberto G. Lopez

seedlings requires an understanding of the effects of irradiance [photosynthetically active radiation (PAR) or photosynthetic photon flux ( PPF )] and temperature to manipulate plant growth and development ( Fausey and Cameron, 2005 ). Some desired

Free access

Paul V. Nelson, Cheon-Young Song, Jinsheng Huang, Carl E. Niedziela Jr., and William H. Swallow

Many ornamental greenhouse crops are grown under some form of stress or growth regulation that limits the full potential for their shoot volume production. This is universally true for young plants produced in plug seedling trays and bedding plant