Growth and water relation parameters in drought-stressed Coriaria nepalensis seedlings

Bargali, Surendra Singh; Tewari, Ashish

doi:10.1016/j.jaridenv.2004.01.002

Cited by 52 publications

(38 citation statements)

References 17 publications

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“…Our study was consistent with those on other species (e.g., Ares and Fownes 1999;Bargali and Tewari 2004;Liu and Stützel 2004;Singh and Singh 2006), in that water stress decreased total dry mass and their components, and altered biomass allocation to root systems resulting in higher R:S ratio in stressed seedlings (Table 1). The positive correlation between root mass and WUE of B. faberi var.…”

Section: Discussionsupporting

confidence: 91%

“…The increased SLA resulting from severe water stress observed here in B. faberi var. microphylla (Table 2) agrees with a finding of Bargali and Tewari (2004) who suggested that plant in low water supply requires large leaf area per leaf weight. It seems that a low RWC would result in stomatal closure and reduced net photosynthetic rate per unit leaf area.…”

Section: Discussionsupporting

confidence: 91%

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Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Bao

et al. 2008

New Forests

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Responses of the endemic leguminous shrub Bauhinia faberi var. microphylla, to various soil water supply regimes were studied in order to assess water stress tolerance of seedlings. Two-month-old seedlings were grown under water supply regimes of 100, 80, 60, 40, and 20% water field capacity (FC), respectively, in a temperature and light-controlled greenhouse. Plant height and leaf number were measured monthly over a 4-month period, while water use (WU), water-use efficiency (WUE), leaf relative water content (RWC), biomass production and its partitioning were recorded at the end of the experiment. Seedlings exhibited the greatest biomass production, height, basal diameter, branch number, leaf number, and leaf area when soil content was at 100% FC, and slightly declined at 80% FC. These parameters declined significantly under 60% FC water supply, and severely reduced under 40 and 20% FC. RWC, WU and WUE decreased, while the ratio of root mass to stem mass (R:S) increased in response to decreasing water supply. Water stress caused leaf shedding, but not plant death. The results demonstrated that B. faberi var. microphylla seedlings could tolerate drought by reducing branching and leaf area while maintaining a high R:S ratio. However, low dry mass and WUE at 40 and 20% FC suggested that the seedlings did not produce significant biomass under prolonged severe water deficit. Therefore, before introducing B. faberi var. microphylla in vegetation restoration efforts, water supply above 40% FC is recommended for seedlings to maintain growth.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 91%

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Bao

et al. 2008

New Forests

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“…After the drought cycle gradually developed over 25 days, leaf traits responded differently to drought and shade application. In D sun leaves SLA noticeably increased (16-18 %) in both water stress levels (Table 1) according to findings in Coriaria nepalensis and Vigna unguiculata (Bargali andTewari 2004, Anyia andHerzog 2004). That variation in SLA may indicate a higher positive carbon balance in these leaves presumably due to a decreased respiration rate under drought conditions (Flexas et al 2006, Quero et al 2006.…”

Section: Discussionsupporting

confidence: 69%

Shade mitigates photoinhibition and enhances water use efficiency in kiwifruit under drought

Montanaro¹,

Dichio²,

Xiloyannis³

2009

Photosynt.

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We tested the hypotheses that a reduction of incident light of 50 % over sun-acclimated leaves of water stressed kiwifruit (Actinidia deliciosa var. deliciosa) would (1) reduce stomatal limitations to carbon supply and (2) mitigate the inactivation of the primary photochemistry associated with photosystem (PS) II, thereby this increases carbon gain and water-use efficiency (WUE). Groups of field-grown vines were either shaded or left naturally exposed and subjected to progressive water stress in order to study moderately and severely droughted vines, while other groups were well irrigated. Daily variations in leaf gas exchange and midday chlorophyll (Chl) a fluorescence were determined once plants had -0.6 MPa (moderate stress) and -1.0 MPa pre-down leaf water potential (severe stress). Variations in Chl pigment content and specific leaf area (SLA) are also discussed. Results reveal that 50 % shade application maintained efficiency of PSII close to 0.8 even under severe drought so that to prevent its large decline (0.65) recorded in sunlit leaves. Under moderate stress level stomata behaviour dominated upon metabolic impairments of PSII. Reduction of irradiance increased WUE (15-20 %) in droughted vines, representing a valuable intervention to save photosynthetic apparatus and improve WUE in vines experiencing typical Mediterranean summer stresses.

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“…In our study, all stressed plants reallocated biomass from shoots to roots, possibly improving water uptake from dry soil so that their root: shoot ratio were higher. This increased RSR under drought has been observed in many other species (Kozlowski and Pallardy 2002;Bargali and Tewari 2004;Liu and Stützel 2004;Yin et al 2004;González-Rodríguez et al 2005;Monclus et al 2006;Dias et al 2007). All of these findings are consistent with the theory of functional balance, which states that plants will react to water deficits with a relative increase in the flow of assimilates to their roots, leading to an increased root mass ratio (Brouwer 1963).…”

Section: Growthsupporting

confidence: 76%

Growth, biomass allocation, and water use efficiency of 31 apple cultivars grown under two water regimes

Liu

Cheng

et al. 2011

Agroforest Syst

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Plant growth, biomass allocation, carbon isotope composition (d 13 C), and water use efficiency (WUE) of 31 cultivars of apple (Malus domestica Borkh.) grown under two water regimes were measured. Drought-stressed plants showed significant declines in tree height, trunk diameter, biomass production, and total leaf area, the extent to which depended upon cultivar. Also, gas exchange rates, instantaneous and long-term efficiencies (WUE I and WUE L , respectively), and values for d 13 C differed among cultivars and watering regimes. Variations in WUE I were mainly due to changes in stomatal conductance (g s ) under drought condition. 'Qinguan' and 'Golden Delicious' had greater trunk diameter, tree height, and had higher biomass production and WUE L under drought stress, implying that they are more suitable for arid and semi-arid regions. Moreover, WUE L was significantly and positively correlated with d 13 C under two watering regimes, which suggests a potential for evaluating water use efficiency of Malus by measuring carbon isotope composition.

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Growth and water relation parameters in drought-stressed Coriaria nepalensis seedlings

Cited by 52 publications

References 17 publications

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Shade mitigates photoinhibition and enhances water use efficiency in kiwifruit under drought

Growth, biomass allocation, and water use efficiency of 31 apple cultivars grown under two water regimes

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