An integrated diagnostic approach to understand drought tolerance in mulberry (Morus indica L.)

Guha, Anirban; Sengupta, Debashree; Rasineni, Girish Kumar; Reddy, A. Ramachandra

doi:10.1016/j.flora.2009.01.004

Cited by 44 publications

(25 citation statements)

References 39 publications

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“…Similar results were found in olive (Olea europaea L.) when subjected to four ET-based irrigation treatments (Doupis et al, 2013). ), increased carotenoids were observed with soil moisture deficits (Guha et al, 2010). Further, our results are in agreement with other crops such as eggplant (Solanum melongena L.) (Kirnak et al, 2001), kiwifruit (Actinidia deliciosa C.F.…”

Section: Pigments Cell Membrane Thermostability and Chlorophyll Stasupporting

confidence: 89%

Sweetpotato Responses to Mid‐ and Late‐Season Soil Moisture Deficits

Gajanayake

Reddy

2016

Crop Science

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Soil moisture‐dependent, quantitative information on sweetpotato [Ipomoea batatas L. (Lam)] plant processes is vital for crop management and modeling because of the projected shrinking and uneven distributions of rainfall and irrigation water supply due to climate change. This study was conducted to quantify the growth, physiology, biomass, and storage root yield responses of sweetpotato under four evapotranspiration‐based irrigation treatments (100, 60, 40, and 20% ET) in sunlit growth chambers. Irrigation treatments were imposed from 41 to 97 d after transplanting. Midday leaf water potentials (LWP) and soil moisture contents were measured throughout the experiment. Gas exchange and other physiological measurements were recorded during last 3 wk of the experiment. Plant growth and developmental parameters were measured at 97 d after transplanting. The midday LWP was strongly and linearly correlated with soil moisture content showing the interplay between these two processes. Net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) declined while photosynthetic water‐use efficiency (Pn/Tr) increased with decreasing LWP. Both total chlorophyll content and cell membrane thermostability (CMT) declined linearly with decreasing LWP. Vine length, leaf area, and node number per plant decreased linearly, by 3.2 cm, 96.6 cm2, and 0.39 no. plant−1, respectively, per unit change in ET‐based irrigation. The optimum soil moisture for total plant and storage root dry weights were obtained under the irrigation treatments of 100 and 72% ET, respectively. Biomass partitioning to storage roots declined linearly and leaf and stem portioning increased with increased irrigation. Outcomes of this research will help producers schedule irrigation to maximize yield and researchers to develop sweetpotato crop models.

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Section: Pigments Cell Membrane Thermostability and Chlorophyll Stasupporting

confidence: 89%

Sweetpotato Responses to Mid‐ and Late‐Season Soil Moisture Deficits

Gajanayake

Reddy

2016

Crop Science

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“…Previous studies have shown that drought tolerant cultivars generally have enhanced constitutive antioxidant enzyme activity under drought stress in comparison with sensitive cultivars. This has been demonstrated under water-limiting stress in numerous plant species, such as Pinus densata (Gao et al, 2009), mulberry (Guha et al, 2010) and woody karst species . Little research, however, has been carried out on gene expression levels associated with antioxidant defense systems.…”

Section: Introductionmentioning

confidence: 94%

“…SWC of soil in a 0-10 cm from the soil surface of each pot was monitored by time domain reflectometry (Soil Moisture Equipment Corp., Santa Bar-bara, CA). RWC was determined according to Guha et al (2010). RWC (%) = [(fw − dw)/(sw − dw)] × 100, where fw is fresh weight of sampled leaves, sw is the mass after rehydration by soaking sampled leaves in distilled water for 24 h, and dw is oven dry weight (105 • C) of leaves.…”

Section: Soil Water Status and Leaf Water Statusmentioning

confidence: 99%

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Changes in leaf morphology, antioxidant activity and photosynthesis capacity in two different drought-tolerant cultivars of chrysanthemum during and after water stress

Sun

Zeng

et al. 2013

Scientia Horticulturae

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“…The decreases in stomatal conductance were accompanied by a drop in water potential throughout the experimental period. The reduced conductance is thus related to a decrease in water lost to transpiration (Guha et al, 2010) and an increase in water use efficiency, which is an important protection mechanism against leaf dehydration and loss of enzyme activity, both of which affect carbon fixation (Parry et al, 2002;Saeidnejad et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Effects of water deficit on morphophysiology, productivity and chemical composition of Ocimum africanum Lour (Lamiaceae)

Santos¹,

Souza²,

Costa³

et al. 2016

Afr. J. Agric. Res.

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Mechanisms by which plants acclimatize to water deficit conditions can affect development and, especially in aromatic plants, the essential oil synthesis. To evaluate the effects of water deficit on Ocimum africanum, seedlings were exposed to water levels corresponding to 100, 80, 70 and 60% of the substrate field capacity. The different watering regimes corresponded to predawn water potentials of -0.5, -0.9, -1.6 and -1.9 MPa, respectively. Decreased stomatal conductance and increased glandular and tector trichome density were observed under water deficit. In addition, reductions in leaf gas exchange and water consumption under water deficit led to decreased plant height, numbers of leaves and inflorescences, and total biomass production. As a result, lower essential oil yield and water use efficiency for biomass production occurred in the -1.9 MPa treatment. The content and production efficiency of essential oil (quantity of oil produced per unit water consumed) were higher in the -0.9 and -1.6 MPa treatments. There were no significant differences among treatments in the chemical composition of essential oil, and the major component of essential oil in leaves and inflorescences was isoeugenol in all treatments. The 80% field capacity watering regime (branch water potential of -0.9 MPa) was best for the growth and production of essential oil in O. africanum, for the cultivation of aromatic plant under drought economically viable in the semi-arid climatic regions.

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An integrated diagnostic approach to understand drought tolerance in mulberry (Morus indica L.)

Cited by 44 publications

References 39 publications

Sweetpotato Responses to Mid‐ and Late‐Season Soil Moisture Deficits

Sweetpotato Responses to Mid‐ and Late‐Season Soil Moisture Deficits

Changes in leaf morphology, antioxidant activity and photosynthesis capacity in two different drought-tolerant cultivars of chrysanthemum during and after water stress

Effects of water deficit on morphophysiology, productivity and chemical composition of Ocimum africanum Lour (Lamiaceae)

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