Jalon
ActiveHelianthus annuus L. · Sunflower
EURALIS SEMILLAS, S.A.
ES
3 records
Variety traits
Drought tolerance of sunflower
Helianthus annuus L.
A complex adaptive trait of sunflower that determines yield stability under moisture deficit due to morphophysiological mechanisms and biochemical regulation of metabolism.
In the reference 75 varieties crop Sunflower, where this is mentioned in the description.
The evaluation of sunflower tolerance is based on biochemical markers, such as the accumulation of free proline, where an index of 4.1 and above indicates high tolerance. Also taken into account are the ability of roots to penetrate deep soil horizons, the water-holding capacity of leaves due to cuticular waxes, and the preservation of cell membrane integrity during dehydration.
From an agronomic perspective, drought tolerance is expressed by a higher threshold for pollen sterilization during high temperatures at the flowering stage and the ability to rapidly recover assimilation after stress. The critical periods for the crop are flowering and seed filling, where moisture deficiency can reduce yield by half, making it effective to maintain a plant density of 45–55 thousand plants per hectare in arid zones.
General information about the subject — on the page Drought tolerance.
Varieties of Sunflower mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Joy
ActiveHelianthus annuus L. · Sunflower
O'S GOLD SEEDS CO.
IT
3 records
HA-26
ActiveHelianthus annuus L. · Sunflower
UA
5 records
FD22CL66
ActiveHelianthus annuus L. · Sunflower
JOITA-PACUREANU MARIASTANCIU DANILSTANCIU MARIAANTON FLORIN GABRIEL
RO
4 records
ES Chromatic
ActiveHelianthus annuus L. · Sunflower
Euralis Semences
IT
3 records
ES ARCADIA SU
ActiveHelianthus annuus L. · Sunflower
Didier Sauvaire
UA
5 records
Falcon
ActiveHelianthus annuus L. · Sunflower
TRIUMPH SEED CO.
ES
6 records
Elsasun IR
ActiveHelianthus annuus L. · Sunflower
Elena Andreea Teodorescu
UA
4 records
Diego
TerminatedHelianthus annuus L. · Sunflower
VERNEUIL RECHERCHE
IT
3 records
Avalon
ActiveHelianthus annuus L. · Sunflower
PARIJ YaROSLAV FEDOROVICh / PARIJ MIROSLAV FEDOROVICh / ZOLOTAREV KONSTANTIN MITROFANOVICh / YaKOVENKO ANATOLIJ ALEKSANDROVICh
UA
4 records
Alcyon RM
TerminatedHelianthus annuus L. · Sunflower
Rustica Prograin Genetique SA (FR)
FR
3 records
P64LE218
ActiveHelianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
ES
UA
4 records
NS H 6054
ActiveHelianthus annuus L. · Sunflower
Miladinovie Dragana, Cvejie Sandra, Jocie Sinisa,
UA
4 records
Petenera
ActiveHelianthus annuus L. · Sunflower
SEMILLAS BATLLE S.A.
IT
3 records
LG50652
ActiveHelianthus annuus L. · Sunflower
LIMAGRAIN EUROPE S.A.
IT
3 records
NS Konstantin
ActiveHelianthus annuus L. · Sunflower
Institut za ratarstvo i povrtarstvo, Novi Sad
UA
6 records
MAS 91OL
TerminatedHelianthus annuus L. · Sunflower
MAS SEEDS
IT
3 records
Enigma CLP
TerminatedHelianthus annuus L. · Sunflower
Dobroudja Agricultural Institute - General Toshevo (BG)
BG
3 records
Azov
ActiveHelianthus annuus L. · Sunflower
ASGROW SEED COMPANY
IT
3 records
T 228 B
TerminatedHelianthus annuus L. · Sunflower
AGRA SEED RESEARCH INTERN
ES
FR
2 records
NK Ferti Oleic
Protection expiredHelianthus annuus L. · Sunflower
SYNGENTA SEEDS AG, CH
FR
IT
2 records
Brio
TerminatedHelianthus annuus L. · Sunflower
PACIFICO
ES
IT
6 records
Waterlo CLP
ActiveHelianthus annuus L. · Sunflower
RAGT 2N S.A.S
IT
2 records
SY Levis
ActiveHelianthus annuus L. · Sunflower
Syngenta Crop Protection AG, CH
FR
3 records