Roger H. Lawson's scientific contributions
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (15)
Lilium longiflomm Thunb., 'Nellie White' and a selection of L. x elegans Thunb., ('D'), were used to produce interspecific hybrids (LAIH) by cut style pollination, ovary slice followed by ovule culture. A total of 303 plants were obtained from 41 ovules through embryogenesis and plantlet regeneration from callus. In 7 to 8 months from transplanting...
Lilium longiflorum Thunb. 'Nellie White' and a selection of L. x elegans Thunb. (hybrid 'D') were used to produce interspecific hybrids by cut style pollination, separated carpel and ovule culture. Separated carpels were cultured on a Murashige and Skoog (MS) medium supplemented with NAA at 0, 0.25, 0.5, and 1.0 mg/L and kinetin at 0, 1.5, 3, and 6...
The effects of watering frequency, bulb size, temperature, and Promalin on flowering of Cyrtanthus elatus , were investigated. Bulbs must be 8 cm, in circum., with minimum of 10 leaf bases before the first inflorescence will develop from a swollen leaf base. One inflorescence was initiated for each set of 5 leaf bases. Watering frequencies did not...
Three lisianthus [Eustoma grandiflorum (Raf.) Shinn.] cultivars 0, 10, 17, 24, or 31 days from sowing were grown in 28C soil for 0, 7, 14, 21, or 28 days to determine the effects of high temperature during seedling growth on the development of rosetted plants. Increasing the duration of high-temperature exposure increased the percentage of rosetted...
Flowering responses of two Anigozanthos hybrids were investigated. Flowering of 20-week old `Regal Claw' and A.manglesii x A.flavidus either from the main fan or the lateral fans was accelerated when plants received a night temp of 13 C, regardless of the photoperiod treatments. Temperature was the major factor controlling flowering of Anigo-zantho...
In 1982 the new crops research program was initiated in the Florist and Nursery Crops Laboratory to increase the diversity of florist crop germplasm in the United States. Anigozanthos, Chamelaucium, Correa, a dwarf form of Eustoma grandiflorum ‘Little Blue Belle’, Chamelaucium, Cupressus, and other crops have been introduced to the industry with in...
Ethylene formation from 1-aminocycloprane-1-carboxylic acid (ACC) was studied in whole protoplasts, evaluolated protoplasts and isolated vacuoles from mesophyll cells of Petunia hybrida L. cv. Pink Magic. The re-formation of the large, central vacuole in evacuolated protoplasts and morphological characteristics of both types of protoplasts were exa...
Twelve different potyviruses and cytoplasmic inclusion proteins were purified from a range of plant species utilizing a single purification protocol. Highly purified preparations have been obtained with yields that reflect the relative concentrations in the starting material; virus yields of up to 15 mg per 100 g of tissue were obtained. In some ca...
In 1980, a conference on tissue culture of fruit crops was held at Beltsville to summarize the current status of this technology and to stimulate interest in it among research scientists, students, and commercial producers in the U. S. Interest in that conference and the proceedings from it far exceeded the expectations of the organizing committee....
Plant cells are characterized by a very prominent vacuole. This organelle carries out many essential cellular functions. For example, vacuoles act as both a temporary and permanent storage site for toxic materials. In addition, the solutes found within this organelle are responsible for osmotic pressure. The vacuole is also a rich reservoir for man...
Citations
... One of the most common problems during the tissue culture process of camelina is the phenomenon of vitrification. Vitrification is a serious problem since it can affect shoot multiplication and culture vigour and can impede the successful transfer of micro-propagated plants to in vivo conditions (13). In this experiment, the ratio of ammonium to nitrate and agar concentration ( Table 4) were studied for the effects of these factors on vitrification. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/367763865522178-1464693146968_Q64/Rob-Griesbach.jpg)
... The number of flower buds was reported to be influenced by the bulb size [28,29]. This was because the size of the flower meristem was also affected by the bulb size and weight [30,31]. However, in this study, we graded the bulb size and used similarly sized bulbs, and thus there seemed to be no difference in the number of flower buds, regardless of storage period. ...
... The most well-known umbellate structure is the inflorescence of the family Amaryllidaceae sensu APG IV (The Angiosperm Phylogeny Group, 2016), which includes Allium (onions). The developmental morphology of a wide number of taxa in the family Amaryllidaceae has been investigated, and the morphological consensus is that the inflorescence comprises an indeterminate primary axis with cymose lateral branches (Bravais and Bravais, 1837;Blaauw, 1931;Luyten and van Waveren, 1938;Hartsema and Leupen, 1942;Mann, 1959;Roh et al., 1992;Theron and Jacobs, 1994;Kamenetsky, 1997;Slabbert, 1997;Kodaira and Fukai, 2005;Zhang et al., 2011). The number of lateral cymose branches and the number of flowers per branch can vary across the family, with multiple evolutionary events leading to uniflory (Meerow, 2010). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/282302291693570-1444317519504_Q64/Alan-Meerow.jpg)
... Many species have been reported as "new cut flowers", some of them cultivated as new varieties (Armitage, 1993;Lawson and Roh, 1995;Huang, 1995) and some of them collected from the flora of each country (Considine, 1993;Van Vuuren et al., 1993) or improving their characteristics (Belhadj et al, 1998). ...
... Similar responses were also observed in the production of interspecific hybrids of Lilium longiflorum Thunb. and L. × elegans (Roh et al., 1996). ...
... Iz tablice 9. se vidi da su kod ukrasnih karakteristika vrtoglava (zlatana) najbolje ocijenjene ukrasne karakteristike cvijeta i to vrlo dobrom ocjenom (3,58). Potom je ukrasnim karakteristikama habitusa dodijeljena ocjena dobar (2,98) i ocjena dovoljan za ukrasne karakteristike lista (2,24). Ispitanici bi ovu vrstu radije primijenili na javnim zelenim površinama (3,50) nego u kućnim vrtovima (2,64). ...
... One primary prerequisite for introducing new taxa into ornamental cultivation is to identify effective and efficient propagation methods (Roh and Lawson, 1998;Wilkins and Erwin, 1998). For example, Roh and Lawson (1998) discuss the importance of uniform germination and propagation potential while Wilkins and Erwin (1998) state the need for consistent, successful, and reproducible propagation techniques for commercialization. ...
... In lily, modern hybrid breeding exploit hybrid vigor of inter-sectional hybridization of Longiflorum, Oriental and Asiatic hybrids 47 . Breeders selects those hybrids for plant height; number of leaves, flowers and bulbils; leaf area; flower size; days to flowering and petal area which indicated that those traits were often found heterotic [48][49][50] . ...
... Vacuole reformation in evacuolated tobacco and petunia This regeneration follows a similar pattern to that seen protoplasts has been shown to occur after culture for in non-cereal protoplasts. 12-44 h (Griesbach and Sink, 1983;Erdmann et al., 1989; Lawrence and Davies, 1987). Reappearance of the vacu-Key words: Evacuolation, oat leaf mesophyll, protoplasts, ole in tobacco is accompanied by increased levels of vacuole regeneration. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/644000239333376-1530553030499_Q64/He-Er-2.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/409139835621376-1474557947002_Q64/Autar-Mattoo.jpg)
... tek yıllık bir bitki olup, kesme çiçek olarak kullanılan bir süs bitkisidir. Anavatanı, Kuzey Amerika olan bitkinin, 'lissos: güzel' ve 'anthos: çiçek' anlamına gelen Yunanca sözcüklerin birleşmesiyle oluştuğu (Harbaugh, 1992;Özkan, 2017), sistematik sınıflandırma kapsamında bilimsel olarak Eustoma grandiflorum olarak bilinmesine rağmen Eustoma andrewsii ve Eustoma russellianum isimleriyle de sinonimlerinin olduğu bildirilmektedir (Everett, 1981;Harbaugh 2000). ...
