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Rice Vocs

Rice Vocs
11
Jul

Pyroclastic

Pertaining to broken fragments of volcanic origin - ash and rock material.

11
Jul

Pyricularia oryzae

The fungus that causes blast disease of rice.

11
Jul

Pyrheliometer

A pyrheliometer is an instrument for direct measurement of solar irradiance. Sunlight enters the instrument through a window and is directed onto a thermopile which converts heat to an electrical signal that can be recorded. The signal voltage is converted via a formula to measure watts per square meter. It is used with a solar tracking system to keep the instrument aimed at the sun. A pyrheliometer is often used in the same setup with a pyranometer.

11
Jul

Pyranometer

A pyranometer is a type of actinometer used to measure broadband solar irradiance on a planar surface and is a sensor that is designed to measure the solar radiation flux density (in watts per metre square) from a field of view of 180 degrees.

11
Jul

Pyramiding genes

Combining into one genotype several major genes that control a trait.

11
Jul

Pure seed

It has a high level or purity with little or no contamination of other varieties or species. Seeds give rise to genetically similar plants.

11
Jul

Pure line selection

A method of selecting the best progeny for breeding from individual plants of a variety or cultivar.

11
Jul

Pure line

1) A line that has been made almost completely homozygous by repeated self-pollination and selection of a specific type (or by the removal of off-types) over generations. 2) A group of identical individuals that always produce offsprings of the same phenotype when intercrossed.

11
Jul

Pure culture

The growth of a single species or strain of an organism in the absence of any other living species or strain.

11
Jul

Pupa

A non-feeding and usually inactive stage in insect development which occurs between the larval and adult stages.

11
Jul

Punctiform

With a depression in the center.

11
Jul

Pulley

A small wheel that turns by a belt to transmit or apply power.

11
Jul

Puddling

Turning the soil into a muddy or watertight paste through secondary tillage.

11
Jul

Puddled soil

A soil whose structure has been mechanically destroyed, allowing the soil to run together when saturated with water. A soil that has been puddled is usually in a massive nonstructural state.

11
Jul

Pubescent

Having a fuzzy surface; specifically, covered with fine soft short hairs.

11
Jul

Pseudoresistance

Apparent resistance which results from transitory characters in potentially susceptible host plants. Types of pseudoresistance are host evasion, induced resistance, and escape.

11
Jul

Psammophytes

Plants which prefer or tolerate sand, particularly fine to medium sand, as a habitat.

11
Jul

Prune

To cut off what is not needed, such as to prune tillers so that the number of tillers in each entry is uniform.

11
Jul

Protoplast fusion

An in vitro technique of producing somatic hybrids between two cultivars, species, or genera. Protoplast fusion provides the unique opportunity to exploit cytoplasmic variability in two parental lines.

11
Jul

Protoplast culture

The isolation and culture of these protoplasts in nutrient medium to form callus and to regenerate plants.

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