Xenia in plants is the effect of pollen on seeds and fruit of the fertilized plant. The effect is separate from the contribution of the pollen towards the next generation.

What is difference between metaxenia and xenia?

Xenia is the effect of genes from the male parent on the development of fruit or seeds. ... Metaxenia is the effect of pollen on fruit shape and other fruit characteristics.

What is meant by metaxenia?

: the effect of a pollen parent on the developing maternal tissues of a seed or fruit outside the embryo and endosperm due to hormones produced by the embryo and endosperm after double fertilization — compare carpoxenia, xenia.

What is xenia in maize?

Xenia can be defined as the effect of the pollen genes on the development of the fruit or the seeds. In maize (Zea mays L) with normal endosperm, the relative advantage in weight of cross-fertilized to self-fertilized kernels can reach 13% when inbred lines are used as females.

What is xenia explain it with the help of example?

One of the most familiar examples of xenia is the different colours that can be produced in maize (Zea mays) by assortment of alleles via individual pollen grains. Such maize cobs are cultivated for decorative purposes. ... For example, a yellow-seeded race may have its yellow colour determined by a recessive allele.

Xenia and MetaXenia | Qna - 04 | Agriculture RS Rajput

20 related questions found

What is date palm metaxenia?

Abstract. The pollen of the date palm. ... This direct effect of the pollen on the parts of the seed and fruit lying outside the embryo and endosperm is called metaxenia.

Who discovered metaxenia?

SWINGLE and NIXON discovered this phenomenon in fruits of the date-plam and the former named it“metaxenia”. We have observed a sort of metaxenia of Swingle or some such phenomenon in some plants of solanaceae. The materials used in this experiment were the following three kinds of plants of genus Solanum. S.

What is the definition for Xenia?

Xenia (Greek: ξενία) is an ancient Greek concept of hospitality. It is almost always translated as 'guest-friendship' or 'ritualized friendship'. It is an institutionalized relationship rooted in generosity, gift exchange, and reciprocity.

Is Xenia a flower?

Zinnias are one of the easiest flowers to grow, as they grow quickly and bloom heavily. Zinnia flowers can create a massive burst of color in your garden, so consider trying them this year!

What is the cause of Xenia phenotype in corn?

The Xenia effect occurs when pollen from the tassel of one corn variety moves from one field to another, landing on the silks of another variety which fertilizes and produces. ... Both the flint corn and dent corn were flowering at the same time, allowing the flint corn to pollinate some kernels on the dent ears.

What is Mosaic endosperm?

(ii) Mosaic endosperm : In some cases, the tissue of endosperm is not homogeneous but there are patches of different colours. Such type of endosperm is called mosaic endosperm and was observed by Webber (1990) in Zea mays. In maize endosperm, red and white patches appear irregularly distributed. ... e.g., Maize.

Is endosperm diploid or haploid?

Complete answer: The endosperm of the gymnosperm is a haploid tissue. In gymnosperm, there are two sperm nuclei of which one degenerates and the endosperm formed is not a real endosperm but a nutritive tissue for the growth and germination of the embryo.

What is Nemec phenomenon?

Pollen embryo sacs are also called NEMEC PHENOMENON, as Nemec discovered them for the first time. According to Nemec, pollen embryo sacs are produced by the repeated divisions of vegetative nucleus while the generative nucleus degenerates.

Who gave Term Xenia?

Note: - Wilhelm Focke defined the term xenia in 1881. - Swingle gave the term metaxenia in 1928. - Xenia and metaxenia effects are shown by angiosperms.

What is Perisperm Toppr?

Perisperm is the nutritive tissue surrounding the embryo in certain seeds and developing from the nucellus of the ovule. After double fertilization, the remnants of nucellus of the ovule in the mature seed is called perisperm.

What are the quality seeds of paddy?

Features of quality seed

➢ It should have genetic purity. ➢ It should have physical purity (no mix of other crop seed, weed seed and inert matter). It should have high germination vigor, germination rate and sprouting capacity. It should be free from seed borne disease and pests.

Is Xenia edible?

Zinnias need fertile soil in full sun, and varieties that grow more than 24 inches (60 cm) tall benefit from staking. ... When allowed to dry until hard and almost crisp and stored under good conditions, zinnia seeds will stay viable for five years or more. Finally, petals snipped from organically grown zinnias are edible.

Are marigolds perennials?

While most Marigolds are grown as annuals, there are some perennial species that will survive in warmer climates. With over 50 species of marigold available, three dominate the bedding flower market: The tallest are African marigolds (T.

Is zinnia a sunflower?

Zinnia is a genus of plants of the sunflower tribe (Heliantheae) within the daisy family (Asteraceae). ... Members of the genus are notable for their solitary long-stemmed flowers that come in a variety of bright colors.

What do you mean by xeric?

: characterized by, relating to, or requiring only a small amount of moisture a xeric habitat a xeric plant — compare hydric, mesic.

Who is Xenia in the Odyssey?

Xenia, the Greek concept of hospitality and the guest-host relationship, was, according to M.I. Finley in “The World of Odysseus”, a powerful institution in Ancient Greek times which solidified relationships between peoples and created alliances (100).

What does Xenia spell?

Noun. New Latin, from Greek, hospitality, from xenos host.

Who discovered the effect of foreign pollen?

Metaxenia: Discovered by Swingle. The effect of foreign pollen on somatic tissue lying outside the endosperm is known as metaxenia.

Is consumed by developing embryo in the seed of?

Explanation: In pea, endosperm is consumed by developing embryo in the seed. The endosperm is completely absorbed by the growing embroyo and the food reserve gets stored in the cotyledons.

Which of the following is the result of double fertilization?

In angiosperms, double fertilization results in the production of an embryo and endosperm, both of which are critical for the development of viable seed. Diploid plants produce diploid embryos and triploid endosperm tissue.