Developmental aberrations in seeds of boron deficient sunflower and recovery
2000
Chatterjee, C. | Nautiyal, N.
Sunflower (Helianthus annuus L.) cv. Modern grown in refined sand at deficient (0.033 mg L-1) boron (B) developed visible symptoms of low B accompanied by marked depression in growth, dry matter, tissue B, flower head size, and seed weight. The B deficient seeds showed a marked decrease in non-reducing sugars and contents of oil and starch whereas in leaves reducing sugars accumulated. Except for slight increase in leaf B and flower size, resumption of sufficient B (0.33 mg L-1) to B deficient plants from the day of anthesis could not appreciably alter the growth, dry matter, head size and seed weight of deficient plants. Apart from this, non-reducing sugar content in seeds increased on resupplying B to deficient plants. A significant decrease in non-reducing sugars and starch content in B sufficient seeds by withdrawing B from the day of anthesis indicate a specific role of B in production and deposition of reserve in the seeds of sunflower.
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