International Journal of Vegetable Science, Jul 3, 2013
ABSTRACT The color of red tomatoes (Solanum lycopersicum L.) is mostly from the carotenoid pigmen... more ABSTRACT The color of red tomatoes (Solanum lycopersicum L.) is mostly from the carotenoid pigment lycopene, which is of interest to consumers and the tomato industry because of its purported protective effects against diabetes, cardiovascular events, and some cancers. Lycopene content was measured in at least 179 tomato lines with pink, red, and dark red fruit derived from a diverse genetic background to determine the level of variation for lycopene and to develop prediction models. Two methods (Tomato Analyzer or DigiEye) for quantifying total lycopene and to develop prediction models were tested on tomato fruit to find a high throughput lycopene measurement system suitable for screening hundreds of lines in a breeding program. The tomato lycopene content ranged from 28 to 133 mg•kg−1 of tomato sample, indicating a wide variation in the set of tomato lines. Using this variation, lycopene prediction models were developed. Though a single equation could not be developed using data from the DigiEye or Tomato Analyzer to predict lycopene content of tomato fruit, individual equations within color groups proved useful in predicting lycopene content (r = 0.77, P Current address for Dan Randall: Shaw Industries Inc., 200 Industrial Blvd., Bainbridge, GA 39817.
Cab Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources, 2020
Heat stress is one of the most important abiotic stresses in plants. Tomato ( Solanum lycopersicu... more Heat stress is one of the most important abiotic stresses in plants. Tomato ( Solanum lycopersicum L.) is sensitive to higher temperatures. Optimum temperatures for tomato production are less than 32/25°C during day and night, respectively. Higher than this temperature causes damage in the plant system and ultimately reduces yield. Reports indicate that it may cause up to 70% crop loss in tomato. With the looming threat of climate change and global warming, it is vital to understand the heat stress tolerance mechanism and current status of efforts to mitigate the damage caused by heat stress in tomato. In this review, we report the physiological mechanism and effect of heat stress in tomato plants at the cellular and whole plant levels. Investigation of tolerance mechanisms may be helpful to design the breeding activities in the future. Furthermore, a summary of breeding efforts made toward the improvement of heat stress tolerance by utilizing genetic and genomic resources in tomato is presented.
International Journal of Vegetable Science, Jul 3, 2013
ABSTRACT The color of red tomatoes (Solanum lycopersicum L.) is mostly from the carotenoid pigmen... more ABSTRACT The color of red tomatoes (Solanum lycopersicum L.) is mostly from the carotenoid pigment lycopene, which is of interest to consumers and the tomato industry because of its purported protective effects against diabetes, cardiovascular events, and some cancers. Lycopene content was measured in at least 179 tomato lines with pink, red, and dark red fruit derived from a diverse genetic background to determine the level of variation for lycopene and to develop prediction models. Two methods (Tomato Analyzer or DigiEye) for quantifying total lycopene and to develop prediction models were tested on tomato fruit to find a high throughput lycopene measurement system suitable for screening hundreds of lines in a breeding program. The tomato lycopene content ranged from 28 to 133 mg•kg−1 of tomato sample, indicating a wide variation in the set of tomato lines. Using this variation, lycopene prediction models were developed. Though a single equation could not be developed using data from the DigiEye or Tomato Analyzer to predict lycopene content of tomato fruit, individual equations within color groups proved useful in predicting lycopene content (r = 0.77, P Current address for Dan Randall: Shaw Industries Inc., 200 Industrial Blvd., Bainbridge, GA 39817.
Cab Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources, 2020
Heat stress is one of the most important abiotic stresses in plants. Tomato ( Solanum lycopersicu... more Heat stress is one of the most important abiotic stresses in plants. Tomato ( Solanum lycopersicum L.) is sensitive to higher temperatures. Optimum temperatures for tomato production are less than 32/25°C during day and night, respectively. Higher than this temperature causes damage in the plant system and ultimately reduces yield. Reports indicate that it may cause up to 70% crop loss in tomato. With the looming threat of climate change and global warming, it is vital to understand the heat stress tolerance mechanism and current status of efforts to mitigate the damage caused by heat stress in tomato. In this review, we report the physiological mechanism and effect of heat stress in tomato plants at the cellular and whole plant levels. Investigation of tolerance mechanisms may be helpful to design the breeding activities in the future. Furthermore, a summary of breeding efforts made toward the improvement of heat stress tolerance by utilizing genetic and genomic resources in tomato is presented.
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Papers by Dilip Panthee