Question
Question: The host for Cercospora personata belongs to this family of angiosperms. A. Gramineae B. Legumin...
The host for Cercospora personata belongs to this family of angiosperms.
A. Gramineae
B. Leguminosae
C. Malvaceae
D. Asclepiadaceae
Solution
Cercospora is a genus of ascomycete fungi. Various species of this genus cause plant diseases and form spots on the leaf. Some fungicides are available and are effective for leaf spot.
Complete Answer:
Angiosperms are different from other seed plants and here are some features of angiosperms:
| Flowering organs | Flowers are the reproductive organs of flowering plants and distinguish from other seed plants. |
|---|---|
| Reduced male parts | Male gametophyte present in angiosperms is reduced in size. Fertilization in angiosperms begins after the pollination. |
| Reduced female gametocyte, 7 cells with eight nuclei | Female reduced gametophyte can be an adaptation for allowing a more rapid seed set. |
| Endosperm | Nutritive tissue. |
| Carpel enclosing the ovules | After the fertilization of the ovary, carpel and surrounding tissues developed into fruit. |
(i) Gramineae: Annual or perennial herbs, branched at base in perennials forming innovations. The plants belonging to this family are present in temperate regions. Food crops are: Wheat (Triticum aestivum), Rice (Oryza sativa), Maize (Zea mays), Oat (Avena sativa), Sugarcane (Saccharum officinarum).
(ii) Malvaceae: It is a family of flowering plants containing 244 genera with 4225 species. Certain members of this family are okra, cotton, and cacao.
(iii) Asclepiadaceae: It consists of 348 genera with 2900 species. Mainly found in tropical to subtropical areas. Some examples are- Kundher, Milkweed, Silkweed etc.
(iv) Leguminosae is an important family of flowering plants. It is also known as pea or legume family. The cercospora is a fungus. Most species are plant pathogens. It causes leaf spots in groundnut (family leguminosae).
The correct answer is Leguminosae.
Note: Cercospora is a large genus and includes 3800 species. Diseases caused by cercospora:
(I) ‘Frog-eye’ leaf spot of tobacco.
(II) Leaf spot disease of the lady's finger.
(III) Sigatoka leaf spot disease of bananas.