scholarly journals Production and Action of Ethylene in Senescing Leaf Discs

1979 ◽  
Vol 64 (5) ◽  
pp. 805-809 ◽  
Author(s):  
Nehemia Aharoni ◽  
James D. Anderson ◽  
Morris Lieberman
Keyword(s):  
Leaf Discs ◽  
Senescing Leaf

scholarly journals Effect of 2-chloroethylphosphonic acid and vanillin on chlorophyll, protein and RNA synthesis in detached cucumber cotyledons, and chlorophyll degradation in senescing leaf discs of kale

2015 ◽  
Vol 40 (2) ◽  
pp. 257-274 ◽  
Author(s):  
J. S. Knypl
Keyword(s):  
Protein Synthesis ◽  
Rna Synthesis ◽  
Opposite Effect ◽  
Chlorophyll Degradation ◽  
Leaf Discs ◽  
Protein And Rna Synthesis ◽  
Chlorophyll Protein ◽  
Cucumber Cotyledons ◽  
Senescing Leaf

N<sup>6</sup>-benzylaminopurine (BAP) and KC1 stimulated growth in detached greening cucumber cotyledons; BAP enhanced RNA synthesis whereas KCl strikingly accelerated leucine-<sup>14</sup>C incorporation into proteins. Vanillin (0.01 M) inhibited greening and protein synthesis, and nullified the stimulatory effects of KC1. a-chloroethylphosphonic acid (CEPA, 0.01 M) inhibited greening without any effect on protein synthesis when it was applied alone; CEPA decreased RNA synthesis, completely nullified the K<sup>+</sup>-induced synthesis of chlorophyll, and reduced the BAP<sup>-</sup> or KCl<sup>-</sup>induced growth. Vanillin inhibited yellowing in 'senescing leaf discs of kale kept in darkness, whereas CEPA had an opposite effect.

scholarly journals Field Evaluation of Tomato Hybrids Engineered with Tomato spotted wilt virus Sequences for Virus Resistance, Agronomic Performance, and Pollen-Mediated Transgene Flow

2005 ◽  
Vol 95 (7) ◽  
pp. 800-807 ◽  
Author(s):  
Gian Paolo Accotto ◽  
Giuseppe Nervo ◽  
Nazzareno Acciarri ◽  
Luciana Tavella ◽  
Manuela Vecchiati ◽  
...  
Keyword(s):  
Tomato Spotted Wilt Virus ◽  
Economic Value ◽  
Field Evaluation ◽  
Fruit Production ◽  
Leaf Discs ◽  
Tomato Spotted Wilt ◽  
Naturally Occurring ◽  
Transgene Flow ◽  
Marketable Fruit ◽  
Wilt Virus

Tomato hybrids obtained from homozygous progeny of line 30-4, engineered for Tomato spotted wilt virus (TSWV) resistance, were tested under field conditions in two locations with their corresponding nontransgenic hybrids. No transgenic hybrid became infected, but 33 to 50% of plants of each nontransgenic hybrid became infected with a severe reduction of marketable fruit production. The transgenic hybrids conformed to the standard agronomic characteristics of the corresponding nontransgenic ones. Fruit were collected from the nontransgenic plots included in the experimental field and from border rows, and seed were used to estimate the flow of the transgene via pollen. No transgene flow was detected in the protected crops; however, in the open field experiment, 0.32% of tomato seedlings were found to contain the genetic modification. Immunity to TSWV infection in 30-4 hybrids was confirmed in laboratory conditions using mechanical inoculation and grafting. Thrips inoculation in leaf discs of line 30-4 demonstrated that TSWV replication was inhibited at the primary infection site but not in leaf discs of a commercial hybrid containing the naturally occurring resistance gene Sw-5. Due to the high economic value of tomato crops worldwide and the importance of TSWV, the engineered resistance described here is of practical value for breeding into cultivars of commercial interest, because it could be combined with naturally occurring resistance, thus greatly reducing the ability of the virus to develop resistance-breaking strains.

Selection of cacao trees resistant to Ceratocystis wilt by inoculation in leaf discs and field

2021 ◽  
Author(s):  
Elisângela dos Santos ◽  
Dilze Maria Argôlo Magalhães ◽  
Uilson Vanderlei Lopes ◽  
Edna Dora Martins Newman Luz
Keyword(s):  
Leaf Discs ◽  
Ceratocystis Wilt ◽  
Selection Of

scholarly journals Direct shoot organogenesis from petiole and leaf discs of Withania somnifera (L.) Dunal

2010 ◽  
Vol 9 (44) ◽  
pp. 7453-7461 ◽  
Author(s):  
Kumar Ghimire Bimal ◽  
Soo Seong Eun ◽  
Hye Kim Eun ◽  
Lamsal Kabir ◽  
Yeon Yu Chang ◽  
...  
Keyword(s):  
Withania Somnifera ◽  
Shoot Organogenesis ◽  
Leaf Discs ◽  
Direct Shoot Organogenesis ◽  
Direct Shoot

scholarly journals Feeding preference of the sugar beet webworm (Spoladea recurvalis F.) (Lepidoptera: Pyralidae) for Trianthema portulacastrum L. (Aizoaceae) and other putative hosts in Puerto Rico

1969 ◽  
Vol 89 (3-4) ◽  
pp. 211-219
Author(s):  
Lorimar Figueroa ◽  
Ángel L. González-Rodríguez ◽  
Nelson Semidey ◽  
Lizzette González
Keyword(s):  
Sugar Beet ◽  
Sweet Cherry ◽  
Solanum Melongena ◽  
Feeding Preference ◽  
Cucumis Sativus L ◽  
Leaf Discs ◽  
Trianthema Portulacastrum ◽  
Choice Tests ◽  
Alternate Food ◽  
Lepidoptera Pyralidae

The feeding preferences of the herbivore Spoladea recurvalis Fabricius (Lepidoptera: Pyralidae) was determined through choice and no-choice tests in the laboratory with 12.7-mm leaf discs of the following weeds and crops: horse purslane (Trianthema portulacastrum L), common pigweed (Amaranthus dubius Mart.), botoncillo (Borreria ocymoides [Burm. F] DC), sugar beet (Beta vulgaris L.), sweet cherry pepper (Capsicum frutescens L.), tomato (Lycopersicon esculentum Mill.), cucumber (Cucumis sativus L.), and eggplant (Solanum melongena L.). Spoladea recurvalis preferred horse purslane as its primary food host plant. The pyralid larva also fed on leaf discs of common pigweed and sugar beet, the only vegetable crop serving as an alternate food plant. Larvae did not feed on the other plants studied (sweet cherry pepper, tomato, cucumber, eggplant and botoncillo), some of which were previously reported as alternate food host plants for the herbivore. This manuscript discusses the application of these findings for the biological control of horse purslane and the foraging behavior of S. recurvalis.

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