Electrolyte leakage and chlorophyll a fluorescence among castor bean cultivars under induced water deficit

Faria, Ana Paula; Lemos-Filho, José Pires de; Modolo, Luzia V.; França, Marcel Giovanni Costa

doi:10.1007/s11738-012-1054-3

Cited by 23 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, the stay green effect was observed in potato plants affected by severe water restriction (Ram ırez et al, 2014;Yactayo et al, 2013), but leads to a decreased yield (Ram ırez et al, 2014). As abiotic stress may cause membrane damage, measurement of electrolyte leakage has been used to assess drought tolerance in several species (de Faria, Lemos, Modolo, & Franca, 2013;Sanchez-Martin, Mur, Rubiales, & Prats, 2012;Tripathy, Zhang, Robin, Nguyen, & Nguyen, 2000).…”

mentioning

confidence: 99%

Drought stress‐induced changes in starch yield and physiological traits in potato

Rudack

Seddig

Sprenger

et al. 2017

J Agronomy Crop Science

View full text Add to dashboard Cite

Drought stress is an important limitation for potato (Solanum tuberosum L.) production as potato depends on appropriate water availability for high yields of good quality. Therefore, especially in the background of climate change, it is an important goal in potato breeding to improve drought stress tolerance. In this study, 34 European starch potato cultivars were evaluated for drought stress tolerance by growing under well‐watered and long‐term drought stress conditions in rainout shelters in 2 years’ pot trials. Besides yield, six physiological traits, that is free proline content, osmolality, total soluble sugar content, chlorophyll content (SPAD), cell membrane stability and crude protein content, were determined in leaves sampled during vegetative growth and during flowering to investigate their association with drought tolerance. ANOVA revealed significant treatment effects for all physiological traits and increased genotypic effects at flowering. The sensitivity of physiological traits to drought was significantly higher during flowering than during vegetative growth. Drought stress decreased starch yield significantly (p < .001), on average by 55%. Starch yield was significantly influenced by genotype and genotype × treatment interactions. Stress tolerance index (STI) calculated from starch yield ranged from 0.26 (sensitive) to 0.76 (tolerant) with significant genotype effects (p ≤ .001). STI correlated positively with cell membrane stability (r = .59) and crude protein content (r = .38) and negatively with osmolality (r = −.57) and total soluble sugar content (r = −.71). These contrary correlations suggest a dual adaptation strategy in potato under long‐term drought stress conditions including increased membrane stability combined with an increased osmolality due to an increased soluble sugar content.

show abstract

mentioning

confidence: 99%

Drought stress‐induced changes in starch yield and physiological traits in potato

Rudack

Seddig

Sprenger

et al. 2017

J Agronomy Crop Science

View full text Add to dashboard Cite

show abstract

“…Maintenance of membrane stability during severe water deficit is important to continue the physiological metabolism under low water potential (Tripathy et al 2000). Faria et al (2013) analyzed castor plants under water deficiency and observed that the extravasation of electrolytes differed between cultivars. A similar result was found in potato plants (Rudack et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Water relations of cassava cultivated under water-deficit levels

2017

View full text Add to dashboard Cite

The tolerance of plants to water deficit involves a series of adaptive mechanisms; however, little is known about the physiological characteristics of cassava (Manihot esculenta Crantz), which is one of the most tolerant crops to adverse environmental conditions. The objective of this work was to evaluate the water relations in cassava plants subjected to different levels of water deficit. The treatments were conducted in three evaluation periods (0, 45 and 90 days after water deficit) and at three soil water tensions (− 10, − 40 and − 70 kPa), with five replicates. The plants were mainly affected at 45 days after the water deficit, with an increase of 42.9% in total chlorophyll content and 35.3% in carotenoid content in plants under a tension of − 70 kPa; however, these plants reduced by 30.8% chlorophyll a content at 90 days of the treatments. The water potential, relative water content and electrolyte leakage in the leaf were not altered by the soil water tension. There was an increase of 35.4% in stomatal density independent of soil water status at 90 days and of 16.0% under tensions of − 40 and − 70 kPa; however, the effective quantum efficiency of photosystem II and rate of electron transport were reduced. Cassava can maintain a leaf water potential close to − 0.3 MPa in the predawn and the integrity of the cell membranes in leaves under a soil water tension of up to − 70 kPa.

show abstract

“…The cell sap was expressed with gentle hand press and the osmotic potential was then measured using the vapor pressure osmometer. Membrane injury index (MII) of a leaf was measured according to the method of Faria et al (2013). Briefly, two sets of leaf samples (1 cm) were cut into uniform discs and then put into test tubes containing 10 ml double‐distilled water.…”

Section: Methodsmentioning

confidence: 99%

Comprehensive evaluation of high‐temperature tolerance induced by heat priming at early growth stages in winter wheat

Khanzada

Feng

Wang

et al. 2022

Physiologia Plantarum

View full text Add to dashboard Cite

Priming is a potential way to enhance stress tolerance in plants. Winter wheat adaptation to harsh environmental conditions is a prominent global predicament. To enhance the productivity and its tolerance to rapidly changing world's environment, wheat plants were subjected to different heat priming events at early growth stages, which effects were studied on subsequent heat stress at booting and flowering stages. The study aimed to observe the major changes in photosynthetic characteristics, antioxidant enzymes system, and sugar metabolism in leaves during wheat adaptation to heat stress applied at booting and flowering stages after heat priming at early growth stage. Heat stress mostly affected the plant's development with a significant reduction in yield, yield components, biomass, osmotic potential (OP), leaf relative water potential (LRWP), and plant photosystem. However, the concomitant increase of membrane injury index (MII), reactive oxygen species (ROS) production, enzymatic activities, and sugar metabolism in primed plants enabled winter wheat plants to tolerate heat stress more after low heat priming (LP) than moderate heat priming (MP). Furthermore, MP at early growth stages reduced the biomass, OP, LRWP, and photosynthetic system while the remarkable increase in sugar metabolism and enzymatic activities increased the ROS production, yield, and yield components under heat stress applied at booting stage. Similarly, LP successfully improved plant tolerance to heat stress applied at flowering stage. In conclusion, LP at early growth stage was beneficial to sustain to heat stress during flowering stage, while MP at early growth stage helped winter wheat to better adapt to heat stress at booting stage. These results encompass a novel research direction for the adaptation of winter wheat to harsh environmental conditions to reduce yield loss.

show abstract

Electrolyte leakage and chlorophyll a fluorescence among castor bean cultivars under induced water deficit

Cited by 23 publications

References 31 publications

Drought stress‐induced changes in starch yield and physiological traits in potato

Drought stress‐induced changes in starch yield and physiological traits in potato

Water relations of cassava cultivated under water-deficit levels

Comprehensive evaluation of high‐temperature tolerance induced by heat priming at early growth stages in winter wheat

Contact Info

Product

Resources

About