Meirysett
ActiveRosa L. · Rose
Meilland Alain A.|Antibes, FR
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.
Meimanesk
ActiveRosa L. · Rose
Meilland Alain A.|Antibes, FR
MINSNOW3
ActiveHydrangea hydrangeoides (Siebold & Zucc.) Bernd Schulz · Japanese-hydrangea
Pineau Patrick
Lancalifornia
ActiveMandevilla sanderi (Hemsl.) Woodson · Brazilian jasmine
Robert Lannes, D.H.M Innovation
Lavang
ActivePoa pratensis L. · Kentucky bluegrass
Landbruks- og matdepartementet, N - 0030 Oslo
Korfliaumi
ActiveRosa L. · Rose
Wilhelm-Alexander Kordes/ Tim-Herman Kordes/ John-Vincent Kordes
KLECA16316
ActiveCalibrachoa Cerv. · Calibrachoa
NILS KLEMM|ANITA STOEVER
KLECA16017
ActiveCalibrachoa Cerv. · Calibrachoa
NILS KLEMM|ANITA STOEVER
Konpulse
ActiveAlstroemeria L. · Alstroemeria
Konst Johannes Wilhelmus Maria|GA Nieuwveen, NL
Lanminnesota
ActiveMandevilla sanderi (Hemsl.) Woodson · Brazilian jasmine
Robert Lannes, D.H.M Innovation
Lanoregon
ActiveMandevilla sanderi (Hemsl.) Woodson · Brazilian jasmine
Robert Lannes, D.H.M Innovation
KLEVP15618
ActiveVerbena L. · Vervain
Ruijun Li
KLEPZ05129
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Nils Klemm
HICANA14
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
van Dijk Roy Robin
DL1501
ActiveThunbergia alata Bojer ex Sims · Black-eyed Susan vine
Levac Denis
Bonsca7200
ActiveScaevola aemula R. Br. · Fairy fan-flower
Dr Andrew Berneutz, Bonza Botanicals Pty Ltd
Balyricose
ActiveSalvia x sylvestris L. · Wood sage
PAN AMERICAN SEED CO
Balscandin
ActiveEchinacea Moench. · Coneflower
Ren Jianping
Balcabrite
ActiveCalibrachoa Cerv. · Calibrachoa
Ren Jianping
Artost
ActiveBrassica oleracea L. (White Cabbage Group) · White cabbage
BEJO ZADEN B.V, NL
NL
5 records
DMS 3111
ActiveZea mays L. · Maize
Kravchenko Viktor Mykolaiovych, Kostiuchenko Viktor Ivanovych, Borysov Viktor Mykolaiovych,
RO
UA
5 records
Top Shelf
ActiveFestuca arundinacea Schreb. · Tall fescue
MCCARTHY RESEARCH FARM
PL
3 records
PRIMA DONA
ActiveSolanum lycopersicum L. · Tomato
IP MASHTAKOV ALEKSEJ ALEKSEEVICH
ES
3 records
Mr. Goodbud
ActiveSedum L. · Ice Plant
Gossett Gary J.|Portland, OR, US