Genotypic variation in intrinsic transpiration efficiency correlates with sugarcane yield under rainfed and irrigated field conditions

Natarajan, S; Basnayake, J.; Lakshmanan, Prakash; Fukai, S.

doi:10.1111/ppl.13221

Cited by 14 publications

(10 citation statements)

References 28 publications

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“…We consider that TE is a physiologically complex trait that depends on multiple physiological parameters, including photosynthesis, stomatal conductance, mesophyll conductance (i.e., the diffusion of CO 2 from sub-stomatal cavities to the sites of carboxylation in the chloroplasts) (Flexas et al, 2008;Flexas & Medrano, 2002), and other conditions that determine carbon balance and growth in plants (Natarajan et al, 2021). As a result, the conditions responsible for high TE in one situation may be associated with a low TE in another environment (Sinclair, 2012).…”

Section: Discussionmentioning

confidence: 99%

Effects of superhydrophobic sand mulching on evapotranspiration and phenotypic responses in tomato (Solanum lycopersicum) plants under normal and reduced irrigation

Odokonyero

Gallo

Santos

et al. 2022

Plant Enviro Interactions

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Irrigated agriculture in arid and semi-arid regions is a vital contributor to the global food supply. However, these regions endure massive evaporative losses that are compensated by exploiting limited freshwater resources. To increase water-use efficiency in these giga-scale operations, plastic mulches are utilized; however, their non-biodegradability and eventual land-filling renders them unsustainable. In response, we have developed superhydrophobic sand (SHS) mulching technology that is comprised of sand grains or sandy soils with a nanoscale coating of paraffin wax.Here, we investigate the effects of 1 cm-thick SHS mulching on the evapotranspiration and phenotypic responses of tomato (Solanum lycopersicum) plants as a model system under normal and reduced irrigation inside controlled growth chambers.Experimental results reveal that under either irrigation scenario, SHS mulching suppresses evaporation and enhances transpiration by 78% and 17%, respectively relative to the unmulched soil. Comprehensive phenotyping revealed that SHS mulching enhanced root xylem vessel diameter, stomatal aperture, stomatal conductance, and chlorophyll content index by 21%, 25%, 28%, and 23%, respectively, in comparison with the unmulched soil. Consequently, total fruit yields, total dry mass, and harvest index increased in SHS-mulched plants by 33%, 20%, and 16%, respectively compared with the unmulched soil. We also provide mechanistic insights into the effects of SHS mulching on plant physiological processes. These results underscore the potential of SHS for realizing food-water security and greening initiatives in arid regions.

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Section: Discussionmentioning

confidence: 99%

Effects of superhydrophobic sand mulching on evapotranspiration and phenotypic responses in tomato (Solanum lycopersicum) plants under normal and reduced irrigation

Odokonyero

Gallo

Santos

et al. 2022

Plant Enviro Interactions

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“…This finding contradicts the proposal that higher TE is critical in increasing crop yields in water-limited environments (Christy et al, 2018, Sinclair, 2012, Rebetzke et al, 2002, Coupel-Ledru et al, 2016, Condon et al, 2004, Vadez and Ratnakumar, 2016). However, TE is a physiologically complex trait that results from a combination of multiple physiological parameters, such as photosynthesis, stomatal conductance, mesophyll conductance (i.e., the diffusion of CO 2 from sub-stomatal cavities to the sites of carboxylation in the chloroplasts) (Flexas and Medrano, 2002, Flexas et al, 2008), and other conditions that determine carbon balance and growth in plants (Natarajan et al, 2021). Consequently, the conditions responsible for the expression of high TE in one situation may be associated with a low TE in another environment (Sinclair, 2012).…”

Section: Discussionmentioning

confidence: 99%

Effects of Superhydrophobic Sand Mulching on Evapotranspiration and Phenotypic Responses in Tomatoes (Solanum lycopersicum) under Normal and Reduced Irrigation

Odokonyero

Gallo

Santos

et al. 2021

Preprint

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Irrigated agriculture in arid and semi-arid regions is a vital contributor to the global food supply; however, these regions endure massive evaporative losses that are compensated by unsustainable freshwater withdrawals. Plastic mulches have been used to curtail evaporation, improve water-use efficiency, and ensure food–water security, but they are non-biodegradable and their disposal is unsustainable. We recently developed superhydrophobic sand (SHS), which comprises sand grains with a nanoscale wax coating that could offer a more sustainable mulching solution. Here, the effects of adding a 1.0 cm-thick layer of SHS mulch on the evapotranspiration and phenotypic responses of tomato (Solanum lycopersicum) plants are studied under normal and reduced irrigation. Under both irrigation regimes, SHS mulching suppressed evaporation and enhanced transpiration by 78% and 17%, respectively relative to the bare soil. Overall, SHS mulching enhanced root xylem vessel diameter, stomatal aperture, stomatal conductance, and chlorophyll content index by 21%, 25%, 28%, and 23%, respectively. Total fruit yields, total dry mass, and harvest index increased in SHS-mulched plants by 33%, 20%, and 16%, respectively than in bare soil. These findings demonstrate the potential of SHS to boost irrigation efficiency in water-limited environments and provide mechanistic insights behind yield enhancement by SHS mulching.

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“…Several studies have shown that drought has a drastic effect on photosynthetic traits, such as net photosynthetic rate [14,15,17]. Low soil moisture and high air temperature generally occur together, and drought leads to evapotranspiration and affects photosynthesis under field conditions [47].…”

Section: Effect Of Drought Stress On Photosynthetic Parameters Under Drought and Recovery Conditionsmentioning

confidence: 99%

“…It is affected not only by the decline of stomatal conductance but also by the level of chloroplast damage under severe stress [11][12][13]. The net photosynthetic rates and stomatal conductance of sugarcane leaves decline after exposure to drought [14][15][16]. The tolerant sugarcane cultivars exhibited better photosynthetic performance than the sensitive cultivar [17].…”

Section: Introductionmentioning

confidence: 99%

Physiological and Agronomic Traits of Certain Sugarcane Genotypes Grown under Field Conditions as Influenced by Early Drought Stress

et al. 2021

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Drought is one of the important problems that drastically affect sugarcane production in several countries. The objective of this research was to investigate the effects of early drought stress on physiological parameters and agronomic traits of six sugarcane genotypes under field conditions. The experiment was arranged in a split plot in a completely randomized block design with three replications. The main plot was represented by three different water regimes: field capacity (FC), ½FC and rain-fed (RF), whereas the subplot consisted of six sugarcane genotypes: KK3 (drought tolerant), Q117 (drought tolerant), LK92-11 (drought susceptible), Ths98-271 (S. spontaneum), KK08-214 (the F1 hybrid derived from S. spontaneum × S. officinarum) and E08-4-019 (the F1 hybrid derived from Erianthus sp. × S. officinarum). The six sugarcane genotypes were subjected to three irrigation treatments. The 45-day-old plants of all sugarcane genotypes were exposed to drought by withholding water for 72 days. Certain photosynthetic parameters were measured in the leaves of four-month-old plants. Certain cane yield parameters were measured in the 12-month-old plants. The results showed that early drought stress decreased the maximum quantum yield of PSII efficiency, net photosynthetic rate, transpiration rate and stomatal conductance. Drought stress significantly (p ≤ 0.01) decreased cane yield. The cane yield and sugar yield of KK3 were significantly (p ≤ 0.01) higher than those of the other genotypes. The wild-type sugarcane and the F1 hybrids derived from the wild and commercial sugarcane could maintain better photosynthetic performance while encountering early drought stress.

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Genotypic variation in intrinsic transpiration efficiency correlates with sugarcane yield under rainfed and irrigated field conditions

Cited by 14 publications

References 28 publications

Effects of superhydrophobic sand mulching on evapotranspiration and phenotypic responses in tomato (Solanum lycopersicum) plants under normal and reduced irrigation

Effects of superhydrophobic sand mulching on evapotranspiration and phenotypic responses in tomato (Solanum lycopersicum) plants under normal and reduced irrigation

Effects of Superhydrophobic Sand Mulching on Evapotranspiration and Phenotypic Responses in Tomatoes (Solanum lycopersicum) under Normal and Reduced Irrigation

Physiological and Agronomic Traits of Certain Sugarcane Genotypes Grown under Field Conditions as Influenced by Early Drought Stress

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