Feast
ActiveAllium fistulosum L. · Welsh onion
TAKII and CO LTD
NL
4 records
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.
Crenshaw
Protection expiredAgrostis stolonifera L. · Creeping bentgrass
Texas Agricultural Experiment Station
FR
4 records
Claudine
ActiveCucumis sativus L. · Cucumber
Seminis SVS Holland, NL
NL
4 records
Chinook
ActiveAgrostis stolonifera L. · Creeping bentgrass
Peak Plant Genetics, LLC & Rutgers, The State University of New Jersey
CZ
4 records
Claudio
ActiveCapsicum annuum L. · Bell pepper
NUNHEMS BV, NL
NL
4 records
Burney
ActiveBrassica oleracea L. (Broccoli Group) · Broccoli
Bejo Zaden, NL
NL
5 records
Aziza
ActiveFestuca arundinacea Schreb. · Tall fescue
RAGT 2N S.A.S
FR
5 records
Apache II
ActiveFestuca arundinacea Schreb. · Tall fescue
PURE SEED TESTING
CZ
4 records
13M
ActiveAgrostis stolonifera L. · Creeping bentgrass
Rutgers, The State University of New Jersey
IT
5 records
Zalice
ActiveAlstroemeria L. · Alstroemeria
van Zanten Plants b.v
Sweet Caroline Green Yellow
ActiveIpomoea batatas (L.) Lam. · Sweet potato
Yencho George Craig|Raleigh, NC, US / Pecota Kenneth|Raleigh, NC, US
Sweet Caroline Red
ActiveIpomoea batatas (L.) Lam. · Sweet potato
Pecota Kenneth|Raleigh, NC, US / Yencho G. Craig|Raleigh, NC, US / Hancock, Jr. Charles Newell|Bear Creek, NC, US
Tec Travio
ActiveLobelia erinus L. · Edging lobelia
Syngenta Seeds B.V.
Stairway to Heaven
ActivePolemonium reptans L. · Creeping polemonium
New England Wildflower Society
Tesdarklin
ActiveAlstroemeria L. · Alstroemeria
Horti Partners V.O.F.
Ipomoea batatas (L.) Lam. · Sweet potato
Yencho George Craig|Raleigh, NC, US / Pecota Kenneth|Raleigh, NC, US
Sakai01
ActiveJacaranda mimosifolia D. Don
SAKAI KIYOSHI
SAKPXC021
Activex Petchoa J. M. H. Shaw · Petchoa
TSUKAHARA JUN
SAKPXC019
Application submittedx Petchoa J. M. H. Shaw · Petchoa
TSUKAHARA JUN
Regbesopi
ActivePelargonium grandiflorum (Andrews) Willd. · Regal pelargonium
Martin Geibel c/o Elsner pac Jungpflanzen GbR
SAKIMP033
ActiveImpatiens New Guinea Group · New Guinea Impatiens
SATO CHIHIRO|MINEMURA SHINJI
PEZZ0001
ActivePentas lanceolata (Forssk.) K. Schum. · Egyptian starcluster
Syngenta Flowers LLC
PEQZ0006
ActivePelargonium L'Hér. ex Ait. · Geranium
Syngenta Flowers LLC
PEQZ0002
ActivePelargonium L'Hér. ex Ait. · Geranium
Syngenta Flowers LLC