Responses to Water Stress in Wheat and Related Wild Species
            <sup>1</sup>

Shimshi, D.; Mayoral, Maria Luisa; Atsmon, Dan

doi:10.2135/cropsci1982.0011183x002200010028x

Cited by 50 publications

(28 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As in the second experiment (Fig. 2) (13). In that study, however, they could not attribute the higher A to stomatal control or to a higher cellular or subcellular capacity for photosynthesis.…”

Section: Methodsmentioning

confidence: 57%

“…Triticum kotschyi is a tetraploid desert annual with reportedly higher photosynthesis both under well watered conditions and at reduced water potentials compared to T. aestivum (13). Although T appears to maintain a higher degree of relative stomatal opening at reduced water potentials than T. aestivum, it is not clear if this is the only factor involved in the control of photosynthesis (13). In this study, we report that stomata had an important role in causing the relatively high photosynthetic rates of T. kotschyi under well watered conditions, but under water deficits the mesophyll capacity for photosynthesis was more important.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Leaf Photosynthesis and Conductance of Selected Triticum Species at Different Water Potentials

Johnson¹,

Mornhinweg²,

Ferris³

et al. 1987

Plant Physiol.

View full text Add to dashboard Cite

Leaf ps exchange characteristics ofa desert annual (Triticum kotschyi [Boiss.j Bowden) appears to maintain a higher degree of relative stomatal opening at reduced water potentials than T. aestivum, it is not clear if this is the only factor involved in the control of photosynthesis (13). In this study, we report that stomata had an important role in causing the relatively high photosynthetic rates of T. kotschyi under well watered conditions, but under water deficits the mesophyll capacity for photosynthesis was more important. Unvernalized plants were grown in growth chambers at 2O°C, 60% RH, and 14 h light (600 Mmol m-2 s-' PAR at pot level). Three seeds were planted per pot about 1.5 cm deep in pots holding 1 L of sterilized sand. Emerged seedlings were thinned to 1 per pot after a week and the remaining plants watered daily with 25% Hoagland solution until the stress treatments were imposed. In the first experiment plants of T. kotschyi and T. aestivum were grown under well watered conditions for 42 d after which gas exchange measurements were made as described below. The experiment was randomized in complete blocks with five replications. In a second experiment plants ofthe two species were grown for 35 d under well-watered conditions before water deficits were imposed by withholding water from pots. The experiment was randomized in complete blocks with four replications with genotype and water stress level (days without water) as experimental factors. Gas exchange measurement for the four water levels were made over a 5-d period with a given stress level completed each day. Plants of each species were measured at 0, 2,3, and 4 d after withholding water from pots. The measurement order for stress level and species within a stress level was randomized. In a third experiment water deficits were applied to T. kotschyi and T. aestivum over a more prolonged period. The water-holding capacity of the sand was determined and the weight of each pot, filled with equal volumes of dry sand, was recorded. The pots were weighed daily and their percent water calculated. Plants were watered to the maximum water holding capacity each day before the start of the stress treatment. For the stress treatment, plants were grown under well watered conditions for 24 d and then allowed to dehydrate to just below 20% of pot water-holding capacity, which took 4 d, and then were watered each day thereafter up to 20% of pot water-holding capacity for a 10-day period. Thus, the stress treatment consisted of a 4-d dehydration period followed by 10 d of prolonged stress. Pots from well watered treatments were watered daily to their pot water holding capacity. The experiment was completely randomized with three replications. MATERIALS AND METHODSGas Exchange Measurements.

show abstract

Section: Methodsmentioning

confidence: 57%

mentioning

confidence: 99%

Leaf Photosynthesis and Conductance of Selected Triticum Species at Different Water Potentials

Johnson¹,

Mornhinweg²,

Ferris³

et al. 1987

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…In addition, decrease in water uptake by roots is accompanied by decrease in cell turgor resulting in lower cell division and cell growth inhibition (Yordanov and Tsonev, 2003). Low water potential in plant tissues results in stomatal closure, reduces photosynthesis, affects respiration, destroys proteins and enzymes, results in production of toxic substances, hormonal disruption and increased level of different kinds of reactive oxygen species (Shimshi et al, 1992) and injures the pigments and plastids (Follows and Boyer, 1996).…”

Section: Introductionmentioning

confidence: 99%

Effect of Seed Inoculation on Alfalfa Tolerance to Water Deficit Stress

Zafari

Ebadi

Godehkahriz

2017

Not Bot Horti Agrobo

View full text Add to dashboard Cite

Water deficit is one of the most important environmental stresses that adversely affect crop growth and production and mycorrhizal fungi and symbiotic bacteria have important role in resistance to drought stress. The effect of biofertilizers on alfalfa stress tolerance was studied at the greenhouse condition. Treatments comprised three water-deficit stresses (35%, 55% and 75% of field capacity) and four seeds inoculations (Glomus mosseae, Sinorhizobium meliloti, G. mosseae + S. meliloti and non-inoculated). Water-deficit stress decrease cell membrane stability (39%), total Chl (24.05%), carotenoid (35.55%), quantum yield (50.64%) and forage yield (28.20%), while increased the proline and soluble sugars content (68.55 and 46.53% respectively) and osmotic potential (45.84%). The inoculation of seeds increased the capability of the plants in counteracting the stress, so that the production of compatible solutes was increased and the photosynthetic indices, proline, osmotic potential, membrane stability and forage yield were improved by seed inoculation. Mycorrhiza improved photosynthetic indexes and proline, but bacteria had more efficacy on membrane stability and forage yield. However, double inoculation due to the synergistic effect of mycorrhiza and Sinorhizobium, had the greatest effect than Solitary inoculation. Our results suggest that biofertilized alfalfa plants were better adapted than non-biofertilized ones to cope with water deficit.

show abstract

“…L'importance du stress subi par la plante a 6t6 d6termin6 d'aprds la r6sistance quotidienne minimum des stomates, une comparaison entre le taux de transpiration rdel et potentiel, la variation diurne du potentiel hydrique foliaire et le potentiel hydrique les feuilles les plus basses avant I'aube. L'analyse des s€ries de donn6es n6cessaires d la d6termination de la r6sis-tance quotidienne minimum des stomates, du rapport entre le taux de (Shimshi et al 1982 In Fig. 3 (Fig.…”

unclassified