Histological and physiological changes in developing seeds and fruit pericarp of pumpkin (Cucurbita pepo L.) grown during different seasons

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dc.contributor.advisorChahal, Gagandeep Kaur
dc.contributor.authorBhavna
dc.date.accessioned2023-12-12T16:47:46Z
dc.date.available2023-12-12T16:47:46Z
dc.date.issued2022
dc.description.abstractThe histological and biochemical changes in developing seeds and pericarp of pumpkin genotypes (hulled and hull-less) in different growing seasons were evaluated in the present study. Biochemical analysis of seed coat revealed that the proteins, lipids and starch content were decreased in the seed coat with advancement of seed development due to translocation of these components towards the seed cotyledon since cotyledon acting as dominant sink. The proteins, lipids and starch content were observed to be more in the seed cotyledon in season II (low temperature) which improved the seed quality and also increased the thickness of seed cotyledon. Further, histological studies of developing seeds also depicted that the seed cotyledon thickness was more in season II as the low temperature slowed the seed development and gave more time to seed for accumulation of biomolecules into seed cotyledon. The seed coat thickness was also found to be more in season II in both the genotypes due to increased content of primary wall components like cellulose, hemicellulose and pectin and their deposition is responsible for increasing the seed coat thickness. The seed length, diameter and hundred seed weight were also more in season II and might be caused by increased seed coat and cotyledon contents. The pectin, cellulose, hemicellulose and lignin contents were observed to be increased with development in the pericarp.The development of pumpkin seeds and fruits hastened in high temperature which decreased the seed quality, while the low temperature slowed the maturity process and enhanced the seed quality.
dc.identifier.citationBhavna (2022). Histological and physiological changes in developing seeds and fruit pericarp of pumpkin (Cucurbita pepo L.) grown during different seasons (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810202762
dc.keywordsPumpkin
dc.keywordstemperature
dc.keywordscotyledon
dc.keywordsseason
dc.keywordspericarp
dc.language.isoEnglish
dc.pages70
dc.publisherPunjab Agricultural University
dc.research.problemHistological and physiological changes in developing seeds and fruit pericarp of pumpkin (Cucurbita pepo L.) grown during different seasons
dc.subBotany
dc.themeHistological and physiological changes in developing seeds and fruit pericarp of pumpkin (Cucurbita pepo L.) grown during different seasons
dc.these.typeM.Sc
dc.titleHistological and physiological changes in developing seeds and fruit pericarp of pumpkin (Cucurbita pepo L.) grown during different seasons
dc.typeThesis
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