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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.

Sources8

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.

ES Anthemis CLP

Active

Helianthus annuus L. · Sunflower

Euralis Semences

AT BG IT UA
10 records

Sanbro

Active

Helianthus annuus L. · Sunflower

Syngenta Seeds S.A.

AT DE ES FR IT
13 records

Aranda

Protection expired

Helianthus annuus L. · Sunflower

SYNGENTA SEEDS AG, CH

BG FR HU IT SK
10 records

SY Daxton

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG| CH

FR IT PT UA
10 records

Sureli

Active

Helianthus annuus L. · Sunflower

Syngenta Participations,CH

AT IT SK UA
10 records

NK Alego

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection AG, CH

BG HU SK UA
8 records

KWS Mondeo

Active

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

HR IT PT UA
9 records

KWS Amores CL

Active

Helianthus annuus L. · Sunflower

KWS, D

IT RO SK UA
11 records

SY Diamantis

Active

Helianthus annuus L. · Sunflower

Syngenta Participations,CH

FR SK UA
9 records

P63le113

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

HU RO UA
13 records

ES Isida

Active

Helianthus annuus L. · Sunflower

Euralis Semences, F

ES FR UA
9 records

Fausto ST

Active

Helianthus annuus L. · Sunflower

STRUBE ESPANA S.A.

AT IT UA
8 records

ES Grafic CL

Active

Helianthus annuus L. · Sunflower

Euralis Semences

IT UA
8 records

ES Amis

Active

Helianthus annuus L. · Sunflower

Euralis Semences

CZ IT RO SK
8 records

Suzuka

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG

ES PT UA
9 records

MAS 83SU

Active

Helianthus annuus L. · Sunflower

MAS SEEDS

IT UA
8 records

Sulfonor

Active

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

IT PT UA
9 records

ES Savana

Active

Helianthus annuus L. · Sunflower

Euralis Semences FR

BG ES UA
9 records

ES Janis

Active

Helianthus annuus L. · Sunflower

Euralis Semences

BG RO UA
9 records

P64le269

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

ES PT RO UA
10 records

LID1068L SU

Active

Helianthus annuus L. · Sunflower

Lidea France SAS, FR

BG IT RO UA
8 records

LG50500

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

ES IT RO UA
8 records

KWS Augustes CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE & CO.KGAA

IT RO SK UA
7 records

Suvango

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG c/o Syngenta International AG

AT IT PT UA
7 records

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