scholarly journals Lauric acid in crown daisy root exudate potently regulates root-knot nematode chemotaxis and disrupts Mi-flp-18 expression to block infection

2013 ◽  
Vol 65 (1) ◽  
pp. 131-141 ◽  
Author(s):  
Linlin Dong ◽  
Xiaolin Li ◽  
Li Huang ◽  
Ying Gao ◽  
Lina Zhong ◽  
...  
Keyword(s):  
Lauric Acid ◽  
Root Exudate ◽  
Root Knot Nematode ◽  
Nematode Chemotaxis

Effects of DCPA on Seedling Infection by Root-Knot Nematode

Weed Science ◽  
1974 ◽  
Vol 22 (1) ◽  
pp. 51-54 ◽  
Author(s):  
R. Kent Romney ◽  
J. Lamar Anderson ◽  
Gerald D. Griffin
Keyword(s):  
Root Exudate ◽  
Cell Structure ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Fibrous Root ◽  
Untreated Soil ◽  
Nematode Larvae ◽  
Soil Adherence ◽  
Altered Cell ◽  
Seedling Infection

Onion (Allium cepaL.) and bean (Phaseolus vulgarisL.) seedlings grown in soil treated with DCPA (dimethyl tetrachloroterephthalate) were less susceptible to northern root-knot nematode (Meloidogyne haplaChitwood) infection than seedlings grown in untreated soil. DCPA treatment of nematode larvae did not alter their pathogenicity. Resistance could be correlated with altered cell structure of the root epidermis, increased root exudate as evidenced by soil adherence, reduced fibrous root development, or both.

scholarly journals Root-knot nematode chemotaxis is positively regulated by l-galactose sidechains of mucilage carbohydrate rhamnogalacturonan-I

2021 ◽  
Vol 7 (27) ◽  
pp. eabh4182
Author(s):  
Allen Yi-Lun Tsai ◽  
Yuka Iwamoto ◽  
Yoichi Tsumuraya ◽  
Morihiro Oota ◽  
Teruko Konishi ◽  
...  
Keyword(s):  
High Specificity ◽  
Environmental Chemicals ◽  
Hydroxyl Groups ◽  
Agricultural Pests ◽  
Root Knot Nematode ◽  
Root Knot Nematodes ◽  
Pectic Polysaccharide ◽  
Rhamnogalacturonan I ◽  
Structures And Properties ◽  
Nematode Chemotaxis

Root-knot nematodes (RKNs) are plant parasites and major agricultural pests. RKNs are thought to locate hosts through chemotaxis by sensing host-secreted chemoattractants; however, the structures and properties of these attractants are not well understood. Here, we describe a previously unknown RKN attractant from flaxseed mucilage that enhances infection of Arabidopsis and tomato, which resembles the pectic polysaccharide rhamnogalacturonan-I (RG-I). Fucose and galactose sidechains of the purified attractant were found to be required for attractant activity. Furthermore, the disaccharide α-l-galactosyl-1,3-l-rhamnose, which forms the linkage between the RG-I backbone and galactose sidechains of the purified attractant, was sufficient to attract RKN. These results show that the α-l-galactosyl-1,3-l-rhamnose linkage in the purified attractant from flaxseed mucilage is essential for RKN attraction. The present work also suggests that nematodes can detect environmental chemicals with high specificity, such as the presence of chiral centers and hydroxyl groups.

Resistance mechanisms ofPrunusrootstocks to root-knot nematode,Meloidogyne incognita

Fruits ◽  
2009 ◽  
Vol 64 (5) ◽  
pp. 295-303 ◽  
Author(s):  
Hang Ye ◽  
Wen-jun Wang ◽  
Guo-jie Liu ◽  
Li-xin Zhu ◽  
Ke-gong Jia
Keyword(s):  
Meloidogyne Incognita ◽  
Resistance Mechanisms ◽  
Root Knot Nematode

Lauric Acid-Induced Thrombocytopenia and Thrombosis in Rabbits

1967 ◽  
Vol 18 (01/02) ◽  
pp. 057-065 ◽  
Author(s):  
G Zbinden
Keyword(s):  
Acid Solution ◽  
Intravenous Injection ◽  
Lauric Acid ◽  
Repeated Administration ◽  
Intravenous Dose ◽  
Acid Injection ◽  
Small Doses ◽  
High Doses

SummaryIntravenous injection of 0.5% lauric acid solution into rabbits caused moderate to marked thrombocytopenia. With small doses (2.5 mg/kg) this thrombocyte decrease was reversible and microscopically demonstrable thrombosis in the lungs was only seen or suspected in a small number of rabbits 10 to 30 min after lauric acid injection. High doses were followed by partly reversible thrombocytopenia and by moderate to marked, sometimes lethal, thrombosis in the lungs still demonstrable 24 hrs after injection. Repeated administration of small doses of lauric acid did not lead to a depletion of the circulating thrombocytes. Thrombocytopenic response, however, appeared to be less pronounced after the second and subsequent injections. Studies with Cr51-labeled platelets indicate that during the reversible thrombocytopenia following a small intravenous dose of lauric acid platelets are retained in various organs, particularly the lungs.

Development of Resistance to Root‐Knot Nematode ( Meloidogyne hapla Chitwood) in Alfalfa ( Medicago sativa L.) 1

Crop Science ◽  
1969 ◽  
Vol 9 (5) ◽  
pp. 624-627 ◽  
Author(s):  
O. J. Hunt ◽  
R. N. Peaden ◽  
L. R. Faulkner ◽  
G. D. Griffin ◽  
H. J. Jensen
Keyword(s):  
Medicago Sativa ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Development Of Resistance ◽  
Medicago Sativa L

Root‐Knot Nematode Interaction with Berseem Clover and Other Temperate Forage Legumes 1

Crop Science ◽  
1985 ◽  
Vol 25 (5) ◽  
pp. 848-851 ◽  
Author(s):  
D. D. Baltensperger ◽  
K. H. Quesenberry ◽  
R. A. Dunn ◽  
M. M. Abd‐Elgawad
Keyword(s):  
Forage Legumes ◽  
Root Knot Nematode ◽  
Berseem Clover

Cotton Resistance to Root-Knot Nematode: I. Penetration and Reproduction

Crop Science ◽  
1995 ◽  
Vol 35 (2) ◽  
pp. 365 ◽  
Author(s):  
R. G. Creech ◽  
J. N. Jenkins ◽  
B. Tang ◽  
G. W. Lawrence ◽  
J. C. McCarty
Keyword(s):  
Root Knot Nematode
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