EFFECTS OF X-RAYS ON ZEA MAYS

Root Modifications Induced in Zea Mays Seedlings by Irradiating Dry Seeds with Soft X-rays.

A Comparison of X-Ray and Ultraviolet Effects on Chromosomes of Zea Mays.

REVIOUS workers have found that in maize the genetic analyses have indicated P an apparent difference between the action of X-ray and ultraviolet on (1) gene mutation, (2) the frequency of reciprocal translocations, (3) the type and frequency of endosperm deficiencies, (4) the ratio of endosperm deficiencies to embryo abortions, and ( 5 ) the types of embryo deficiencies. These contrasts have b...

Effects of aluminum toxicity on maize (Zea mays L.) seedlings

Aluminum toxicity is one of the most deleterious factors for plant growth in acidic soils because over 50% of the world’s potentially arable lands are acidic. In recent years, considerable research has been conducted to understand the mechanisms of Al toxicity and tolerance in plants. This paper reviews the effects of different concentration of Al on plant shoot, root physiological parameters s...

The Effects of Translocation on Growth in Zea Mays.

H E concept and proof that the effect of a gene is dependent upon its T location in respect to other genes as well as on its innate constitution has developed almost entirely from experiments on Drosophila melanogaster. Proof of “position effects” is inadequate in other organisms. The evidence from Drosophila experiments has been critically reviewed by DOBZHANSKY (1936) and MULLER (1941). This ...

Recombination in Zea Mays

meiotic process in plants or animals does not necessarily produce the same T:!rcentage of recombinants in male and female germ cells. In maize, the frequency of recombination in a particular chromosomal region is usually higher in microsporogenesis than in megasporogenesis, if a difference exists at all. Chromosomes 2 and 10, according to genetic tests thus far, have similar recombination frequ...