Use of physiological parameters as fast tools to screen for drought tolerance in sugarcane
By M. Silva, J. Jifon, J. Silva, Vivek Sharma. 2007
357 citations recorded by the source corpus.
Drought is one of the major limitations to plant productivity worldwide. Identifying suitable screening tools and quantifiable traits would facilitate the crop improvement process for drought tolerance. In the present study, we evaluated the ability of four relatively physiological parameters (variable-to-maximum chlorophyll a fluorescence ratio, F v/F m; estimated leaf chlorophyll content via SPAD index; leaf temperature, LT; and, leaf relative water content, RWC) to distinguish between drought tolerant and susceptible sugarcane genotypes subjected to a 90-d drought cycle. Eight field-grown genotypes were studied. By 45 d after the onset of treatments, the F v/F m, SPAD index and RWC of drought-stressed plants had declined significantly in all genotypes compared to values at the onset of well-watered treatments. However, the reductions were more severe in leaves of susceptible genotypes. Under drought stress, the tolerant genotypes as a group, maintained higher F v/F m (8%), SPAD index (15%), and RWC (16%) than susceptible genotypes. In general, LT of drought-stressed plants was higher (~4oC) than that of well-watered plants but the relative increase was greater among drought susceptible genotypes. Under drought stress, LT of tolerant genotypes was on average 2.2oC lower than that of susceptible genotypes. The results are consistent with the tolerant-susceptible classification of these genotypes and indicate that these tools can be reliable in screening for drought tolerance, with F v/F m, SPAD index and LT having the added advantage of being nondestructive and easily and quickly assessed.
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/fc047aebe5db7a1a5f1a6708e1065f7e1deab90a
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Citations in the corpus
- Physiological parameters in sugarcane cultivars submitted to water deficit (2010, background): “…and sugars (Molinari et al., 2007; McCormick et al.; 2008), reduction in photosynthetic efficiency photosystem II (Angelopoulos et al., 1996; Silva et al., 2007), reduction in the relative water content in leaves (Silva et al., 2007; Wahid and Close, 2007; Lobato et al., 2008), and decrease…”
- Photosynthetic response and nitrogen use efficiency of sugarcane under drought stress conditions with different nitrogen application levels (2017, background): “Many previous studies discovered the same effects of drought stress on A, gs, and chlorophyll content or SPAD value of sugarcane (Barbosa et al., 2015; Du et al., 1996; Graça et al., 2010; Jangpromma et al., 2010; Koonjah et al., 2006; Silva et al., 2007, 2011).”
- Produtividade de três cultivares de cana-de-açúcar sob manejos de sequeiro e irrigado por gotejamento (2011, background): “Ainda a falta de água reduz a quantidade e a razão da fluorescência (Fv/Fm) da clorofila e o conteúdo relativo de água nas folhas, variáveis correlacionadas com produtividade (Silva et al., 2007).”
- Physiological responses to drought stress in wild relatives of wheat: implications for wheat improvement (2017, background): “RWC is an important physiological criterion of the grade of tissue and cell hydration that is necessary for optimum physiological and biochemical functioning and growth processes in plants (Silva et al. 2007).”
- Comprehending crystalline β-carotene accumulation by comparing engineered cell models and the natural carotenoid-rich system of citrus (2011, neutral): “The transcript abundance was normalized against peanut Ubiquitin (Luo et al. , 2005) transcript levels.”
- Drought Stresses on Seed Germination and Early Growth of Maize and Sorghum (2019, background): “According to Silva et al. (2007), one of the first processes affected in response to decreased water availability is cell expansion, highly dependent process turgidity of the plants.”