KWS Helia 04 RO
TerminatedHelianthus annuus L. · Sunflower
Martin Gansmann
UA
1 record
Variety traits
Heat tolerance
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.
Breakdown by crop
Heat tolerance of tomato
14
Heat tolerance — Cauliflower
13
Heat tolerance of maize
10
Heat tolerance in pepper
8
Heat Tolerance — Soft Wheat
7
Heat tolerance of lettuce
7
Heat Tolerance — Tall Fescue
5
Heat Tolerance — Broccoli
5
Heat tolerance of Calibrachoa
4
Heat tolerance of common bean
4
Heat tolerance of garden strawberry
4
Heat Tolerance in White Cabbage
4
Heat tolerance of cucumber
4
Heat tolerance of sunflower
3
Found in these crops
Varieties that feature this in their description
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.
Klegoes
TerminatedPelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
KLEMM SIEGFRIED| Siegfried Klemm
DE
1 record
Koroleva odeska
ActiveTriticum aestivum L. · Bread wheat
Ihnatovskyi Oleksandr Oleksandrovych, Khodakova Tetiana Mykolaivna, Reshetnikova Valentyna Semenivna, Aleksieienko IEvhenii Viktorovych, Honcharuk Nina Oleksandrivna, Lytvynenko Raisa Ivanivna, Holub IEvheniia Anatoliivna, Lytvynenko Mykola Antonovych,
UA
2 records
Kolmoon
Protection expiredCephalanthus occidentalis L. · button-willow
Gebr. Kolster/Pape
NL
1 record
Khersons`kyi
TerminatedSolanum melongena L. · Eggplant
Voievodin IUrii Ihorovych, Shkumat Volodymyr Petrovych, Kholodniak Oleh Heorhiiovych,
UA
1 record
Jubilee F1
ActiveBrassica oleracea L. (White Cabbage Group) · White cabbage
Ger Bimsdeboer
UA
1 record
Kaspar F1
TerminatedRaphanus sativus L. var. sativus · Radish
Joske van der Burg
UA
1 record
Hopak
ActiveBeta vulgaris Garden Beet Group · Garden beet
Polivoda Lidiia Ivanivna, Vasylak Iryna Myroslavivna, Zavertaliuk Volodymyr Filimonovych, Sych Iryna Mykhailivna,
UA
2 records
Henichanka
ActiveTriticum aestivum L. · Bread wheat
Lazer Petro Nartsysovych, Yokich Drahan Radomyrovych, Zhuzha Oleksandr Dmytrovych, Honcharova Kapitalina V'iacheslavivna, Babenko Dmytro Viktorovych,
UA
2 records
Harmonie F1
Application submittedCucumis sativus L. · Cucumber
Yan Kulstra
UA
2 records
ICEBAZAAR
Application submittedLactuca sativa L. var. crispa L. · Leaf lettuce
Hellie Dodson
UA
2 records
GS 12 F1
TerminatedSolanum lycopersicum L. · Tomato
Erik Bastet
UA
1 record
Greco a palla
Application submittedOcimum basilicum L. · Basil
PUBBLICO DOMINIO
IT
1 record
Grandor
ActiveCucumis sativus L. · Cucumber
Shevchenko Andrii Oleksiiovych
UA
2 records
Genaros F1
TerminatedSolanum lycopersicum L. · Tomato
Maren Shurmans
UA
1 record
Gold Leopard
Application submittedCanna x generalis L. H. Bailey · Garden canna
TAKII & CO LTD
NL
1 record
Gitana
ActiveBrassica oleracea L. (Cauliflower Group) · Cauliflower
Clause Tezier, FR
FR
1 record
Forsag F1
TerminatedSolanum lycopersicum L. · Tomato
Jean Clause Mercier
UA
2 records
Favorytka odeska
ActiveTriticum aestivum L. · Bread wheat
Ihnatovskyi Oleksandr Oleksandrovych, Khodakova Tetiana Mykolaivna, Reshetnikova Valentyna Semenivna, Aleksieienko IEvhenii Viktorovych, Honcharuk Nina Oleksandrivna, Lytvynenko Raisa Ivanivna, Holub IEvheniia Anatoliivna, Lytvynenko Mykola Antonovych,
UA
2 records
FANTASIA
TerminatedPelargonium L'Hér. ex Ait. · Geranium
Christa Hofmann (DE)
FR
1 record
Emiko F1
ActiveBrassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
Ger Beemsterboer
UA
1 record
Dnistrianka odeska
TerminatedTriticum aestivum L. · Bread wheat
Kirchuk IEvhenii Illich, Ihnatovskyi Oleksandr Oleksandrovych, Babaiants Olha Vadymivna, Lytvynenko Raisa Ivanivna, Alieksieienko IEvhenii Viktorovych, Lytvynenko Mykola Antonovych,
UA
2 records
DESPAN
Protection expiredLagerstroemia indica L. · Crape myrtle
Pepinieres DESMARTIS SA (FR)
FR
1 record
Darselect Gold
TerminatedFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Darbonne Pepiniere| FR
FR
1 record