Response of sugarcane genotypes to water deficit stress

Hemaprabha, G.; Nagarajan, R.; Alarmelu, S.

doi:10.1007/bf02942718

Cited by 32 publications

(28 citation statements)

References 2 publications

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“…As with others crops, the productivity of sugarcane, an important crop in Brazilian agro-industries due to its by-products such as sugar and ethanol, is highly dependent on water availability (Hemaprabha et al 2004, Inman-Bamber 2004.…”

Section: Introductionmentioning

confidence: 99%

Physiological limitations in two sugarcane varieties under water suppression and after recovering

Medeiros¹,

Silva²,

Nogueira³

et al. 2013

Theor. Exp. Plant Physiol.

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Increasing water scarcity and depleted water productivity in irrigated soils are inducing farmers to adopt improved varieties, such as those with high-capacity tolerance. The use of tolerant varieties of sugarcane might substantially avoid the decline of productivity under water deficit. This research aimed to evaluate the harmful effects of drought on the physiology of two sugarcane varieties (RB867515 and RB962962) during the initial development. Young plants were subjected to irrigation suspension until total stomata closure, and then rewatered. Significant reduction on stomatal conductance, transpiration, and net photosynthesis were observed. RB867515 showed a faster stomatal closure while RB962962 slowed the effects of drought on the gas exchanges parameters with a faster recovering after rewatering. Accumulation of carbohydrates, amino acids, proline, and protein in the leaves and roots of the stressed plants occurred in both varieties, substantially linked to reduction of the leaf water potential. Due to the severity of stress, this accumulation was not enough to maintain the cell turgor pressure, so relative water content was diminished. Water stress affected the contents of chlorophyll (a, b, and total) in both varieties, but not the levels of carotenoids. There was a significant reduction in dry matter

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Section: Introductionmentioning

confidence: 99%

Physiological limitations in two sugarcane varieties under water suppression and after recovering

Medeiros¹,

Silva²,

Nogueira³

et al. 2013

Theor. Exp. Plant Physiol.

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“…Queiroz et al (2011) employed multivariate analysis of biochemical (proline and trehalose osmolytes) and physiological characters to categorize IAC91-5155 as drought tolerant genotypes of sugarcane (Queiroz et al 2011). Also, the multivariate parameters have been suggested as effective criteria for drought tolerant selection in sugarcane genotypes (Hemaprabha et al 2004;Vasantha et al 2005;Hemaprabha et al 2006;Silva et al 2008;Ishaq and Olaoye 2009).…”

Section: Multivariate Cluster Analysismentioning

confidence: 99%

“…These observations are supported by previous findings. For example, single cane weight of 55-high sugared genotypes was reported to decline to 66.10% when grown under drought stress conditions (Hemaprabha et al 2004). Moreover, the stalk number and stalk weight of 80 sugarcane genotypes decreased by 15.93% and 22.47%, respectively, when subjected to limited irrigation (Silva et al 2008).…”

Section: Field Trial Evaluationmentioning

confidence: 99%

“…Water deficit is one of the most vital abiotic stresses limiting crop productivity (Ashraf, 2010;Ashraf et al 2011), including that of sugarcane (Hemaprabha et al 2004;Silva et al 2008;Ishaq and Olaoye 2009). The reduction in plant growth is the first response of sugarcane to water deficit; however, enhanced production of organic osmolytes (such as glycinebetaine and proline), reactive oxygen species (ROS), and reduced photosynthetic capacity have been reported as physiological and biochemical responses of sugarcane to osmotic stress conditions (Azevedo et al 2011;Queiroz et al 2011;Thapa et al 2011).…”

mentioning

confidence: 99%

“…In most of previous studies, a single parameter has been used as a selection criterion for screening sugarcane germplasm for drought tolerance (Wagih et al 2003;Hemaprabha et al 2004;Hemaprabha et al 2006) and the results have not been so encouraging in terms of identification of tolerant genotypes. Thus, the aim of the present investigation was to compare different (seven) sugarcane cultivars grown in vitro and field conditions for drought tolerance screening using the Ward's cluster analysis based on a number of physiological, biochemical and morphological parameters.…”

mentioning

confidence: 99%

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Evaluating sugarcane (Saccharum sp.) cultivars for water deficit tolerance using some key physiological markers

Cha–um

Wangmoon

Mongkolsiriwatana

et al. 2012

Plant Biotechnology

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Seven sugarcane (Saccharum sp.) commercial cultivars, viz., , originally derived from meristem cuttings were subjected to simulated osmotic stress (as 200 mM mannitol) under controlled environmental conditions. Proline content in the leaf tissues of all cultivars except K92-80, increased in plants subjected to mannitol-induced osmotic stress. Chlorophyll a (Chl a ), chlorophyll b (Chl b ), total chlorophyll (TC), maximum quantum yield of PSII (F v /F m ), and photon yield of PSII (Φ PSII ) of all seven cultivars decreased under osmotic stress resulting in a reduction in net-photosynthetic rate (P n ). A positive correlation was found between F v / F m and Φ PSII , proline content and non-photochemical quenching (NPQ), Φ PSII and P n , and P n and plant dry weight in the sugarcane cultivars. Based upon Ward's multivariate cluster analyses of data for proline content, photosynthetic capacity, chlorophyll fluorescence, and growth inhibition, three cultivars (K88-92, K92-80 and UT-94-2-483) were identified as water deficit sensitive, whereas four (K84-200, K95-84, K97-32 and LK92-11) as water deficit tolerant. These observations on different cultivar's sensitivity/tolerance were confirmed by growth and yield attributes measured in a field trial. The plant dry weight (in vitro) correlated positively with total stalk weight of sugarcane cultivars

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