Responses to water stress of apoplastic water fraction and bulk modulus of elasticity in sunflower (Helianthus annuus L.) genotypes of contrasting capacity for osmotic adjustment

1994 ◽  
Vol 166 (1) ◽  
pp. 101-107 ◽  
Author(s):  
C. A. Chimenti ◽  
A. J. Hall
Keyword(s):  
Water Stress ◽  
Bulk Modulus ◽  
Helianthus Annuus ◽  
Osmotic Adjustment ◽  
Modulus Of Elasticity ◽  
Water Fraction ◽  
Helianthus Annuus L

scholarly journals In vitro and in vivo water stress in sunflower, Helianthus annuus L

Helia ◽  
2004 ◽  
Vol 27 (40) ◽  
pp. 227-236 ◽  
Author(s):  
H. Turhan ◽  
I. Baser
Keyword(s):  
Water Stress ◽  
Helianthus Annuus ◽  
Helianthus Annuus L

Water Stress in Sunflower (Helianthus annuus L.): I. Effect on Plant Development

1980 ◽  
Vol 46 (1) ◽  
pp. 61-70 ◽  
Author(s):  
T. M. YEGAPPAN ◽  
D. M. PATON ◽  
C. T. GATES ◽  
W. J. MÜLLER
Keyword(s):  
Water Stress ◽  
Helianthus Annuus ◽  
Plant Development ◽  
Helianthus Annuus L

scholarly journals EFFECT OF OSMOTIC PRESSURE ON GERMINATION OF SUNFLOWER SEEDS (Helianthus annuus L.) / EFECTO DE LA PRESION OSMOTICA SOBRE LA GERMINACION DE SEMILLAS DEL GIRASOL (Helianthus annuus L.) / INFLUENCE DE LA PRESSION OSMOTIQUE SUR LA GERMINATION DE LA SEMENCE DE TOURNESOL (Helianthus annuus L.)

Helia ◽  
2001 ◽  
Vol 24 (35) ◽  
pp. 129-134 ◽  
Author(s):  
Mohammed El Midaoui ◽  
Ahmed Talouizte ◽  
Mohamed Benbella ◽  
Hervé Serieys ◽  
Yves Griveau ◽  
...  
Keyword(s):  
Water Stress ◽  
Helianthus Annuus ◽  
Crop Production ◽  
Water Shortage ◽  
Limiting Factor ◽  
Arid Areas ◽  
Sunflower Seeds ◽  
Helianthus Annuus L ◽  
Significant Difference ◽  
Semi Arid

SUMMARYIn arid and semi arid areas, water is the most limiting factor of crop production. Germination is susceptible to water shortage. Experimentation was undertaken to study the effect of water stress on germination of seeds of three sunflower genotypes (Oro 9, Mirasol and Albena). Six PEG 6000 osmotic constraints were tested (0, -0.4, -0.6, -1, -1.2 and -1.6 MPa). Results showed no significant difference between germination percent of the control and -0.4 MPa treatment and between -0.8, -1 and -1.2 MPa treatments. Germination percent was most reduced at -1.6 MPa (-65%). Mean germination duration was also affected and the highest value was obtained for -1.6 MPa (4.95 days, related to an increase of 185%). Differences between genotypes were significant in the treatment at -1 MPa.

scholarly journals Wild and Cultivated Sunflower (Helianthus annuus L.) Do Not Differ in Salinity Tolerance When Taking Vigor into Account

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1013
Author(s):  
Vivian H. Tran ◽  
Andries A. Temme ◽  
Lisa A. Donovan
Keyword(s):  
Helianthus Annuus ◽  
Salinity Tolerance ◽  
Osmotic Adjustment ◽  
Abiotic Stress Tolerance ◽  
Wild Relatives ◽  
Elemental Content ◽  
Growth Responses ◽  
Helianthus Annuus L ◽  
Trade Offs ◽  
Wild Accessions

Cultivated crops are expected to be less stress tolerant than their wild relatives, leading to efforts to mine wild relatives for traits to increase crop tolerance. However, empirical tests of this expectation often confound tolerance with plant vigor. We assessed whether wild and cultivated Helianthus annuus L. differed for salinity tolerance with 0 and 150 mM NaCl treatments. Salinity tolerance was assessed as the proportional reduction in biomass and as the deviation from expected performance based on vigor. Cultivated accessions had a greater proportional decline in biomass than wild accessions, but proportional decline was positively associated with vigor in both. Thus, wild and cultivated H. annuus did not differ for tolerance when variation in vigor was corrected for statistically. For traits potentially related to tolerance mechanisms, wild and cultivated accessions differed for elemental content and allocation of N, P, K, Mg, Ca, S, Na, Fe, Mn, B, Cu, and Zn for some tissues, biomass allocation, specific leaf area, and leaf succulence. However, these traits were generally unrelated to tolerance corrected for vigor. Osmotic adjustment was associated with tolerance corrected for vigor only in wild accessions where more osmotic adjustment was associated with greater tolerance. Our results for H. annuus suggest that efforts to use wild relatives to enhance crop abiotic stress tolerance will benefit from greater knowledge of traits related to plant growth responses decoupled from vigor, in order to get beyond potential growth-tolerance trade-offs.

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