Variety traits
Heat tolerance is a plant's genetic ability to maintain metabolic activity and productivity under high temperature conditions. It manifests as resistance to protein denaturation, turgor loss, and generative organ mortality.
Mentioned in descriptions 1 598 varieties reference book.
Heat tolerance is a genetically determined ability of plants to withstand high air and soil temperatures without significant damage to development and yield. When critical values, typically ranging from 35–40 °C, are exceeded, processes of protein denaturation and cell membrane degradation begin in plant tissues. Externally, this manifests as wilting, the appearance of heat scorch, flower/fruit abscission, and pollen mortality, leading to significant yield losses and sterility.
This trait is not static and changes during plant ontogeny: the seedling and flowering stages are considered the most vulnerable to overheating. Variety resistance is ensured by two key strategies: an overheating avoidance mechanism based on intensive transpiration via a well-developed root system, and physiological endurance. The latter includes the ability of cells to retain bound water, increased cytoplasm viscosity, and the active synthesis of specialized heat-shock proteins/enzymes.
Evaluation of variety heat tolerance is carried out using laboratory climate chambers or field express-methods, measuring the degree of tissue browning, chlorophyll fluorescence, or proline concentration in cells as a stress marker. Varieties with high heat tolerance are capable of consistent fruiting at temperatures of 35–40 °C and above, whereas low tolerance leads to functional inhibition as early as 30–35 °C. A temperature of 50 °C is considered the critical threshold for most agricultural crops, leading to cell death.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Triticum aestivum L. · Bread wheat
Bosakovska Nataliia IUriivna, Bredins`ka Nadiia Stepanivna, Babaiants Lazar Tihranovych, Nakonechnyi Mykola IUriiovych, Narhan Tetiana Pavlivna, Fedchenko Volodymyr Pavlovych, Yeryniak Mykola Ivanovych, Lyfenko Savelii Pylypovych,
Cucurbita pepo L. · Field pumpkin
Sakata Seed Sudamerica Ltd (BR)
Spinacia oleracea L. · Spinach
Pop Vriend Research B.V.
Phaseolus vulgaris L. · Common bean
Gautier Semences SAS (FR)
Festuca arundinacea Schreb. · Tall fescue
PURE SEED TESTING
Solanum lycopersicum L. var. lycopersicum · Tomato
MYaZINA LYuBOV' ANATOL'EVNA
Solanum lycopersicum L. · Tomato
Hazera Genetics Ltd (IL)
Festuca arundinacea Schreb. · Tall fescue
PURE SEED TESTING
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Vilmorin SA (FR)
Cymbidium Sw. · Cymbidium
Carpenter Milton
Solanum lycopersicum L. · Tomato
Graines Gautier SA (FR)
Beta vulgaris Garden Beet Group · Garden beet
Sakata Seed America Inc. Woodland Innovation Center
Zea mays L. · Maize
Motrenko Volodymyr Ivanovych, Husak IUliia Viktorivna, Halechko Ivan Dmytrovych, Bondar` Tetiana Mykolaivna, Kupar Ivan Mykhailovych, Bodenko Natalia Anatoliivna, Il`chenko Larisa Anatoliivna, Fed`ko Mykola Mykolaiovych, Cherchel` Vladyslav IUriiovych, Dz
Zea mays L. · Maize
BORYSOV VIKTOR
Cichorium endivia L. · Endive
Tezier SA (FR)
Zea mays L. · Maize
Bernats`kyi Maksym Mykhailovych, Bondar` Tetiana Mykolaivna, Kupar Ivan Mykhailovych, Bodenko Natalia Anatoliivna, Nehoda Tetiana Volodymyrivna, Marochko Valentyna Anatoliivna, Chernkov Anatolii Vasyl`ovych, Fed`ko Mykola Mykolaiovych, Cherchel` Vladyslav
Lactuca sativa L. · Lettuce
Domaine Public (FR)
Zea mays L. · Maize
Halechko Ivan Dmytrovych, Borysov Viktor Mykolaiovych,
Zea mays L. · Maize
KRAVCHENKO VIKTOR MYKOLAIOVYCH, BORYSOV VIKTOR MYKOLAIOVYCH
Zea mays L. · Maize
Cherchel Vladyslav IUriiovych, Dziubetskyi Borys Volodymyrovych,
Cichorium endivia L. · Endive
Domaine Public (FR)
Zea mays L. · Maize
Hodz` Mykola Vasyl`ovych, Sen Oleksandr Vitaliiovych, Kupar IUliia IUriivna, Riabchenko Eduard Mykolaiovych, Nehoda Tetiana Volodymyrivna, Haidash Oleksandr Leonidovych, Bodenko Natalia Anatoliivna, Fedko Mykola Mykolaiovych, Cherchel Vladyslav IUriiovych
Zea mays L. · Maize
Shevchenko Serhii Oleksandrovych, Fedko Mykola Mykolaiovych, Borysov Viktor Mykolaiovych,