In land plants, there is an alternation of generations b...

Question

In land plants, there is an alternation of generations between a haploid gametophyte generation and a diploid sporophytic generation. Both generations are typically multicellular and may be free-living. The male (pollen) and female (embryo sac) gametophytes are the haploid generation of flowering plants.

How would you conduct a screen to identify genes required for female gametophyte development in Arabidopsis?

Accepted Answer

Hi, everyone. Welcome back. Here's our next question. Which of the following genes contributes to the differentiation of micros spores into pollen grains during the growth of male gametophyte in plants. And we have four different answer choices that are four different gene names uh all in capital letters. So they're all abbreviations for a longer gene name. Choice A is A R F eight. Choice B fa ma choice C MS one and choice D TCP 20. Well, our answer choice here is going to be choice C MS one. The MS here stands for male sterility which helps us uh guess that that would contribute here. We recall that the micros spores are small haploid structures that will then develop into pollen grains, which are those reproductive male gametes in the plants. And this MS one is part of this differentiation because it's necessary for the growth of the total cells which nourish the growing micropore. So without those toed cells to provide nourishment, the pollen grains cannot develop, which will lead to male stability in the plant. Thus the name of the gene. So we know which is our correct answer. But we'll look just briefly at the other answer choices, choice A A R F eight in that case stands for oxen response factor. And that is involved in the growth and development of plants, but not specifically the development of the male gametophyte. So that's why that's not correct. And the same goes for choice D the gene TCP which is an abbreviation for a very long name. And since that's not our answer choice, we'll just note that, that it's a transcription factor also involved in plant growth and development. But again, not specifically in the differentiation of micros spores into pollen, greens, so not correct. And then choice B fa ma stands for female gametophyte maturation arrest, which as we can tell by the name will affect the development of the female gametophyte. But our question is asking us about the male goop phys. So choice B is not correct. So again, which contributes to the differentiation of micros spores into pollen grains. And that's choice C the gene MS one. See you in the next video.

Key Concepts

Alternation of Generations

Gametophyte Development

Genetic Screening Techniques

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