Q47: What type of dormancy is caused by impermeable seed coat? - Silviculture, Agroforestry, Forest Management, Tree Improvement & Utilization - ICAR AIEEA PG Forestry / Agroforestry 14 July 2023 Shift-1 Paper | Agrigyan

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ICAR AIEEA PG Forestry / Agroforestry 14 July 2023 Shift-1 Paper

MCQ (Single Correct)

What type of dormancy is caused by impermeable seed coat?

अभेद्य बीजावरण के कारण किस प्रकार की प्रसुप्ति होती है?

Physical dormancy भौतिक प्रसुप्ति Physiological dormancy शरीरक्रियात्मक प्रसुप्ति Endogenous dormancy अंतर्जात प्रसुप्ति Thermo dormancy थर्मो प्रसुप्ति

Classification of seed dormancy (Nikolaeva / Baskin & Baskin):

Physical dormancy (PY): Caused by water-impermeable seed coat or fruit coat layers (e.g. thick macrosclereid palisade layers in Fabaceae, Malvaceae, Acacia, and Albizia), preventing moisture imbibition until scarified.
Physiological dormancy is caused by metabolic/hormonal inhibitors within embryo.
Endogenous dormancy resides within embryo or endosperm tissues.
Thermodormancy is induced by unfavorable high temperatures.

Option breakdown:
Physical dormancy is caused by hard, impermeable seed coats.
Caused by chemical inhibitors.
Internal embryo dormancy.
Temperature-induced dormancy.

बीज प्रसुप्ति (Dormancy) के प्रकार:

भौतिक प्रसुप्ति (Physical dormancy) सही उत्तर है। जब बीज का आवरण (Seed coat) जल और हवा के लिए पूरी तरह अभेद्य और कठोर होता है (जैसे लेग्यूम व बबूल कुल के वृक्षों में), तब इसे भौतिक प्रसुप्ति कहते हैं, जिसे खुरचकर (Scarification) तोड़ा जाता है।
शरीरक्रियात्मक: आंतरिक रासायनिक अवरोधकों (जैसे ABA) से होती है।
अंतर्जात: भ्रूण के भीतर होती है।
तापमान जनित प्रसुप्ति।

विकल्पों का विश्लेषण:
भौतिक प्रसुप्ति सही उत्तर है।
गलत है।
गलत है।
गलत है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

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