Plant Pathology MCQ Question and Answer | Agriculture MCQ Question

Hordeiviruses are Tripartite.
Tripartite is divided into or composed of three parts.
Hordeivirus is a genus of viruses, in the family Virgaviridae. Plants serve as natural hosts. There are four species in this genus.
Viruses in the genus Hordeivirus are non-enveloped, with rod-shaped geometries. The diameter is around 20 - 25 nm, with a length of 20 - 25 nm. Genomes are linear and segmented, tripartite or quadripartite, around 3.3 kb in length.

Loose smut of wheat is internally seed-borne.
Loose smut of barley and wheat are internally seed-borne and carried as a small colony of fungus inside the seed embryo rather than as spores on the seed coat.
These are the only internally seed-borne smuts that occur in Australian cereal crops. Contaminated machinery and soil do not transmit these diseases.

Study of pollen grains is Palynology.
The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics.
Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination.

Fish oil, Linseed oil and Gum arabic are stickers.

Chlorophyll is soluble in Organic solvents.
Chlorophyll is any of several related green pigments found in cyanobacteria and the chloroplasts of algae and plants.
Chlorophyll is not soluble in water, and it is first mixed with a small quantity of vegetable oil to obtain the desired solution. It is soluble in alcohol, ether, and other organic solvents.

RSD is caused by Gram (+) fastidious bacteria and Clavibacter xyli.
The ratoon stunting disease (RSD), is caused by the fastidious gram-positive bacteria Leifsonia xyli subsp. xyli, is the most important sugarcane disease.
Production losses may exceed 50%, depending on the susceptibility of the genotype.

An abnormal increase in the size of plant organs due to the increase in the number of cells is called Hyperplasia.
It is an enlargement of an organ or tissue caused by an increase in the amount of organic tissue that results from cell proliferation.
Hyperplasia may be due to any number of causes, including the proliferation of the basal layer of the epidermis.

Tent toxin is produced by Alternaria alternata among the following fungus.
Alternaria alternata is a fungus that has been recorded to cause leaf spots and other diseases on over 380 host species of plant.
This host-specific mycotoxin is called fumonisin B₁. It was identified and confirmed by research conducted on fast atom bombardment and ion spray mass spectrometry.

Common scab is checked with Wet soil.
A common scab of potatoes is a soil-borne disease caused by the bacteria-like organism Streptomyces scabies.
It's been reported that increasing soil moisture to 80 - 85 percent during tuber initiation until tubers are 1 - 1.5 inches in size can reduce common scab incidence.

PEP is a CO₂ acceptor in the C₄ plant.
C₄ carbon fixation is one of three known photosynthetic processes of carbon fixation in plants.
CO₂ is initially fixed in the mesophyll cells by the enzyme PEP carboxylase which reacts the three-carbon phosphoenolpyruvate (PEP) with CO₂ to form the four-carbon oxaloacetic acid (OAA). Thus, PEP is the first acceptor of CO₂ in C₄ plants.