Q.44
ICAR AIEEA PG Plant Sciences 09 July 2023 (Shift 1) Paper
MCQ (Single Correct) +4 −1
English हिन्दी

Which one of the following are biotrophic fungi?

(A) Albugo
(B) Puccinia
(C) Glomus
(D) Blumeria

Choose the correct answer from the options given below:

निम्नलिखित में से कौन से बायोट्रोफिक कवक (Biotrophic fungi) हैं?
(A) अल्बुगो (Albugo)
(B) पक्सीनिया (Puccinia)
(C) ग्लोमस (Glomus)
(D) ब्लूमेरिया (Blumeria)
नीचे दिए गए विकल्पों में से सही उत्तर चुनें:

EXPLANATION Heterosis, Inbreeding Depression, Combining Ability and Hybrid Seed Production

To be classified strictly as 'biotrophic fungi':

  • Puccinia (B) is an obligate biotrophic true fungus (Basidiomycota, causing rusts).
  • Glomus (C) is an obligate symbiotic biotrophic true fungus (Glomeromycota, forming arbuscular mycorrhiza in living plant roots).
  • Blumeria (D) is an obligate biotrophic true fungus (Ascomycota, causing powdery mildew of cereals).
  • Albugo (A), although an obligate biotroph causing white rust of crucifers, is taxonomically an OOMYCETE (Kingdom Chromista/Stramenopila), NOT a true fungus!
Therefore, the biotrophic fungi are (B), (C), and (D) only.

वैज्ञानिक वर्गीकरण के आधार पर 'बायोट्रोफिक कवक' (Biotrophic fungi) का विश्लेषण:

  • पक्सीनिया (Puccinia) (B): एक वास्तविक अविकल्पी परजीवी कवक (Basidiomycota) है, जो किट्ट रोग उत्पन्न करता है।
  • ग्लोमस (Glomus) (C): जड़ों में सहजीवी बायोट्रोफिक वास्तविक कवक (Glomeromycota - AM कवक) है।
  • ब्लूमेरिया (Blumeria) (D): चूर्णी आसिता (Powdery mildew) का अविकल्पी वास्तविक कवक (Ascomycota) है।
  • अल्बुगो (Albugo) (A): यद्यपि यह अविकल्पी परजीवी है, किंतु यह कवक (Fungi) नहीं बल्कि एक ओओमाइसीट (Oomycete / Chromista) है।
अतः वास्तविक बायोट्रोफिक कवक केवल (B), (C) और (D) हैं।
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