PNABD246.pdf

*0183 Chand, P. ; Varma, J.P. 1980. Some characteristics of mungbean and
urdbean varieties reaistant and susceptible to yellow mosaic virus. INDIAN
PHYTOPATHOLOGY, v.33(l):48-53. [En] [En Abstj (A:PS)
Some biochemical, morphological and anatomical characteristics of the
leaves of some mungbean and blackgram varieties resistant and susceptible to
yellow mosaic virus were investigated. Higher levels of phenol and sugar in the
leaves did not seem to impart resistance. Total protein content and some free
amino acids were perhaps related to resistance/susceptibility although protein
pattern as determined by SDS-poly-acrylamide gel electrophoresis was the same.
Resistant varieties had significantly more 3-4 septate hooked hairs and thicker
cuticles than the susceptible varieties which had fewer straight non-septate
leaf hairs and thinner cuticles. [AS]
*0184 Thongmeearkom, P. ; Honda, Y. ; Saito, Y. ; Syamananda, R. 1980.
Nuclear ultrastructural changes and aggregates of viruslike particles in
rungbean cells affected by mungbean yellow mosaic disease. PHYTOPATHOLOGY,
v."1(1):41-44. [En] [En Abst] (A:PS)
Yellow mosaic disease of mungbean in Thailand was caused by a
whitefly-transmitted agent, presumably a virus. Ultrastructural changes similar
to those previously reported for whitefly-transmitted viruses are associated
with the disease. The viruslike particles (VLPs) associated with the disease
were isometric, about 15-20 nm in diameter, and often formed loose aggregates
that sometimes almost filled the total nuclear volume of infected phloem cells.
Mungbean infected by whitefly transmission or by grafting had hypertrophied
nucleoli, aggregates of VLPs, and fibrillar bodies in the nuclei of phloem
cells as early as 2 days before symptom appearance. In vacuoles or lumens of
the partially or fully differentiated infected sieve elements, VLPs
occasionally formed aggregates having a double cylindrical arrangement of
particles. No VLPs were detected in tissues other than the phloem of infected
plants or in any tissues of comparable healthy plants. [AS]
*0185 Marimuthu, T. ; Subramanian, C.L. ; Mohan, R. 1981. Assessment of
yield loss due to yellow mosaic infection in mungbean. PULSE CROPS NEWSLETTER,
v.1(1):104. [En] (A:PS)
The number of pods, seeds and seed yield per plant were recorded, for
healthy and MYDV infected mungbean plants. The results showed that MYMV caused
severe reduction in number of pods, seeds and seed yield per plant. The yield
loss ranged between 30 and 70%. [EMS]
*0186 Pearson, M.N. 1981. A mosaic disease of mung bean in Papua New
Guinea. AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY, v.10(2):31. [En]
(REP.MB-2316)
A mosaic condition of mungbean was observed at Bubia where seed imported
from Taiwan was being multiplied for distribution throughout Papua New Guinea.
Symptoms included a bright yellow mosaic on young, developing leaves, slight
leaf curl and reduction in plant size and pod size. The disease was transmitted
to healthy mungbean plants by grafting but not mechanically nor through seed.
From the available information the disease appears most similar to the yellow
mosaic of mungbean in India. [THH]
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