scholarly journals A review of the history and taxonomy of the enigmatic southern African endemic wild lettuce Lactuca dregeana DC. (Asteraceae: Lactuceae: Lactucinae)

2017 ◽  
Vol 108 ◽  
pp. 352-358 ◽  
Author(s):  
Z.O. van Herwijnen ◽  
J.C. Manning
Keyword(s):  
2007 ◽  
Vol 0 (0) ◽  
pp. 070522224929002-???
Author(s):  
M. Salehi ◽  
K. Izadpanah ◽  
N. Nejat ◽  
M. Siampour

1943 ◽  
Vol 21b (10) ◽  
pp. 195-201 ◽  
Author(s):  
Wm. T. Turrall ◽  
H. Smedley ◽  
J. Klassen

Application of the froth flotation methods used in mineral dressing operations to the separation of rubber–resin fractions of milkweed offers hope of placing the extraction of such plant materials on a continuous rather than a batch basis. When the flotation method was used, no chemical treatment or flotation agents were necessary for the separation of rubber–resin from milkweed, though additional flotation reagents were found necessary for some other plants. The rubber–resin components of all plants studied, namely, milkweed, dogbane, goat's-beard, sow thistle, and wild lettuce, were successfully concentrated.Under favourable conditions rubber–resins may not agglomerate during ball-milling; in some instances the flotation method can be used for the separation of the dispersed rubber–resin.


2017 ◽  
Vol 19 (6) ◽  
pp. 1-8 ◽  
Author(s):  
Olawole Obembe ◽  
Oluwakemi Bello ◽  
Oluwadurotimi Aworunse ◽  
Jacob Popoola ◽  
Olivia Akposibruke ◽  
...  
Keyword(s):  

Oikos ◽  
1981 ◽  
Vol 36 (3) ◽  
pp. 326 ◽  
Author(s):  
Malcolm Marks ◽  
Stephen Prince

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1163G-1163
Author(s):  
Valerie Haley ◽  
James D. McCreight

Segregating generations from crosses of cultivated lettuce (Lactuca sativa L.) with wild lettuce (L. saligna L.) are affected by sterility and abnormal growth. Resistance to lettuce infectious yellows virus (LIYV) was, therefore, studied in crosses of previously reported LIYV-resistant (PI 261653) with LIYV-susceptible (PI 490999, PI 491000 and PI 491001) L. saligna accessions. Simple Mendelian ratios for resistance (measured as numbers of symptomless and symptomatic plants, and as number of symptomatic leaves per plant) to LIYV were not evident. PI 491001 had the fewest symptomatic plants and the fewest symptomatic leaves per plant. The potential value of L. saligna for development of LIYV-resistant cultivated lettuce will be discussed.


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