Patriot Salmon
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Lemon David
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.
Meigroupy
ActiveRosa L. · Rose
Meilland Alain A.|Antibes, FR
LISSJUDY
ActiveHydrangea paniculata Siebold · Panicled hydrangea
Peter Catt
Marshmallow
ActiveLeucanthemum x superbum (Bergmans ex J. W. Ingram) D. H. Kent · Shasta daisy
Hansen Hans A
KLECA23A07
Application submittedCalibrachoa Cerv. · Calibrachoa
Klemm+Sohn GmbH &Co.KG
KLESG15004
ActiveJamesbrittenia grandiflora (Galpin) Hilliard
Nils Klemm^^^Katinka Wilde
M8867P
ActiveCoreopsis grandiflora Hogg ex Sweet · Large-flowered tickseed
Blair Winner
Lansouthcarolina
ActiveMandevilla x amabilis (Backh. & Backh. f.) Dress x M. boliviensis (Hook. f.) Woodson · Mandevilla
Robert Lannes, D.H.M Innovation
LOBZ0011
ActiveLobelia erinus L. · Edging lobelia
Syngenta Participations AG
KLEBA04075
ActiveXerochrysum bracteatum (Vent.) Tzvelev · Strawflower
Nils Klemm
Kompeito
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Toyokazu Ichie
INNEMLIBAN
ActiveNemesia Vent. · Nemesia
Silvia Hofmann
Intercomersey
ActiveRosa L. · Rose
Interplant Roses B.V
Inlbupripr
ActiveLobularia · Sweet alyssum
Teruo Takatomi
INARGWHIMO
ActiveArgyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy
RUTH ELSEN
KLECA14263
ActiveCalibrachoa Cerv. · Calibrachoa
NILS KLEMM|ANITA STOEVER
Hillav
ActiveLavandula x intermedia Emeric ex Loisel. · Lavandin
Hillier Nurseries Ltd
Fireball
ActiveHibiscus L. · Hibiscus
Fleming's Flower Fields Inc.
G15180
ActiveHypoestes phyllostachya Baker · Polka dot plant
Uchneat Michael S.
Fanfare Citronella
ActiveGaillardia x grandiflora hort. ex Van Houtte · Blanket flower
Lintott Keith George / Read Charles Richard
Fiwowit
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Hofmann Christa
Duesapi
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Tobias Dümmen
Botex 011
ActiveBuddleja davidii Franch. · Butterfly bush
Koot Johannes Adrianus Maria
Dancat266
ActiveTorenia L. · Bluewings
Gavriel Danziger