PJB-2023-227
EFFECT OF THERMAL STRESS ON SUGARCANE RECOVERY RATE AND YIELD COMPONENTS
Faisal Mehdi
Abstract
Yield and quality of sugarcane have been severely hampered during the last three decades owing to high temperature stress. The aim of this study was to determine the effect on yield component and their influences on sugar recovery rate under heat stress at the maturity stage. In this study, two different sugarcane cultivars (S2003-US-633 and SPF-238) were grown in the control group, subjected to heat (45 ± 2 °C) stress and recovery conditions at the maturity stage. Sugar quality parameter and morphological analysis were carried out. The results showed that the response of plant yield and quality attributes revealed significant declines in both cultivars. Correlation analysis manifested a significant positive correlation among sugar recovery rate%, while a significant negative correlation was observed with reducing sugar and fiber contents in both cultivars. Maximum, root length, internodal distance, yield, and sugar recovery found in S2003-US-633 as compared to SPF-238. Contrarily, maximum fiber content, reducing sugar, and number of nodes were exhibited in SPF-238. According to our data, the high yielding and sugar recovery rate cultivar S2003-US-633 is considered thermotolerant, while the high reducing sugar and fiber content cultivar SPF-238 is susceptible. These findings can therefore open up new opportunities for screening new thermotolerant sugarcane varieties.
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