Short?term heat stress during flowering results in a decline in Canola seed productivity

Oilseed rape (Brassica napus) or Canola is an important oilseed crop produced and consumed globally. The predicted increase in the frequency of high-temperature events associated with climate change poses a threat to productivity. In present work, we report impact short-term heat stress on reproductive fitness yield components Canola. Short episodes, especially above 36°C, resulted diminished due reduced pollen viability germinability. Heat exposure led asynchronous male female development suppressed developing buds. As temperature increased 32°C, seed production decreased significantly. Temperatures beyond 38°C >50% reduction total weight. Short-term also components, vigour post-harvest characteristics. Biochemical investigations seeds harvested from heat-stressed (40°C for 12 hr) plants showed oil content along variable fatty acid composition. omega-6/omega-3 ratios response indicated possible decline nutritional quality. Understanding short episodes can provide efficient tolerance screening tools pave way stress-tolerant B. napus varieties.