Xylem embolism and stomatal regulation in two rubber clones ( Hevea brasiliensis Muell. Arg.)

Sangsing, Krissada; Kasemsap, Poonpipope; Thanisawanyangkura, Sornprach; Sangkhasila, Kumut; Gohet, Eric; Thaler, Philippe; Cochard, Hervé

doi:10.1007/s00468-003-0286-7

Cited by 44 publications

(23 citation statements)

References 27 publications

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“…It was hypothesised that a higher susceptibility to cavitation/embolism in the drought-sensitive clone result from a steeper decline in hydraulic conductance under drought conditions (Costa e Silva et al 2004). Clonal differences in hydraulic architecture have also been reported by previous studies (Vander Willigen and Pammenter 1998;Sangsing et al 2004).…”

Section: Discussionsupporting

confidence: 59%

Responses to chilling of two Eucalyptus globulus clones with contrasting drought resistance

Silva¹,

Shvaleva

Almeida³

et al. 2007

Functional Plant Biol.

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The effect of chilling on growth and plant hydraulic properties in a drought-resistant clone (CN5) and a drought-sensitive clone (ST51) of Eucalyptus globulus Labill. was evaluated. Chilling (10/5 • C, day/night) led to a general decrease in growth of both clones and significant reductions in root hydraulic conductivity, rate of photosynthesis and stomatal conductance in comparison to plants grown at control temperature (24/16 • C). The drought-resistant CN5 clone maintained higher root growth and lower leaf-to-root-area ratio than the drought-sensitive ST51 clone, in both temperature treatments. Conversely, ST51 exhibited greater carbon allocation to the foliage and higher hydraulic conductance than clone CN5 at both temperatures. Plants of both clones, when acclimated to chilling, maintained a higher hydraulic conductivity than control plants exposed to chilling temperatures without acclimation. Under chilling, the main differences between clones were a higher water status and anthocyanin concentration in CN5 plants, and a stronger inhibition of root growth in ST51 plants. Except for roots, the hypothesis of a lower depression of growth rate in the drought-resistant clone under chilling was not verified. However, higher root growth under low temperatures, as observed in CN5, can be an advantageous trait in Mediterranean-type environments, protecting trees against summer water-stress.

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Section: Discussionsupporting

confidence: 59%

Responses to chilling of two Eucalyptus globulus clones with contrasting drought resistance

Silva¹,

Shvaleva

Almeida³

et al. 2007

Functional Plant Biol.

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“…To moderate the reduced leaf water potential and to avoid cavitation (Sperry et al 1993, Hubbard et al 1999, Sangsing et al 2004, stomatal conductance (g s ) is reduced. This limits carbon uptake and prevents water loss through transpiration (Hubbard et al 1999, Bond et al 2007, which explains the midday depression in the gas exchange rate (Koike et al 2001a, Grassi et al 2005.…”

Section: --mentioning

confidence: 99%

Photosynthetic water use efficiency in tree crowns of Shorea beccariana and Dryobalanops aromatica in a tropical rain forest in Sarawak, East Malaysia

Kitahashi¹,

Ichie²,

Maruyama³

et al. 2008

Photosynt.

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Photosynthetic water use efficiency (PWUE), stomatal conductance (g s ), and water potential were measured at two different positions in the tree crown of two emergent tropical tree species (Shorea beccariana Burck, Dryobalanops aromatica Gaertn. f.). The trees were about 50 m high, in a tropical rain forest in Sarawak, East Malaysia. In both species, g s at the upper crown position at midday was lower than at the lower crown position, even though both positions were exposed to full sunlight; the difference was greater in S. beccariana. Hydraulic limitation occurs in the upper crown position in both species. A midday depression was observed in the photon saturated photosynthetic rate in both species, especially at the upper crown. However, PWUE was markedly higher in the upper crown than the lower crown at midday, even though no morphological adjustment was observed in the leaves; this difference was greater in S. beccariana.

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“…Thus, it is logical to expect that current rubber plantations in northeastern Thailand and central Cambodia must cope with strong seasonal water stress via the SPAC context, such as limiting tree water use by regulating stomatal behavior in response to soil moisture deficit, and compensating for lack of water near the surface during the dry season by exploiting deeper soil water. Further, it is important to note that a previous study (Sangsing et al, 2004) found different rubber clones exhibit varying degrees of adaptability to water stress, thus it would be expected that water use efficiency and risk of hydraulic fracture vary with clone type in a particular climate.…”

Section: Introductionmentioning

confidence: 98%

How do rubber (Hevea brasiliensis) plantations behave under seasonal water stress in northeastern Thailand and central Cambodia?

Kumagai

Mudd

Giambelluca

et al. 2015

Agricultural and Forest Meteorology

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a b s t r a c tDelineating the characteristics of biosphere-atmosphere exchange in rubber (Hevea brasiliensis Müll. Arg.) plantations, which are rapidly expanding throughout mainland Southeast Asia, is important to understanding the impacts of the land-use change on environmental processes. In attempt to shed new light on the impacts of conversion to rubber, we have conducted eddy flux measurements over a 3-year period in two rubber plantation sites: (1) Som Sanuk, located in northeastern Thailand; and (2) Cambodian Rubber Research Institute (CRRI), located in central Cambodia. Both sites have a distinct dry season. We used a combination of actual evapotranspiration (E T ) flux measurements and an inverted version of a simple 2-layer E T model for estimating the mean canopy stomatal conductance (g s ). The potential water balance (precipitation (P) − potential evaporation (E T POT )) for each season (i.e.revealed when and how the water use is controlled. In the seasons when actual water balance (P − E T ) was negative (DJF and MAM), the deficit was compensated with soil water from the previous season at depths of 0-2 m (Thailand site) and 0-3 m (Cambodia site). At both sites, the reference value of g s (g sref ) and the sensitivity of g s to atmospheric demand (m) appeared to be less in DJF and MAM than each in the other two 3-month periods (seasons). On average, in a whole year, m/g sref was less in Thailand («0.6) than in Cambodia (near 0.6 for part of the year), suggesting that there was less sufficient stomatal regulation at the Thailand site, where there might be little risk of water stress-induced hydraulic failure because of its higher annual rainfall amount. In comparison, at CRRI where annual P − E T POT was negative, there was stricter stomatal regulation, preventing excessive xylem cavitation.

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Xylem embolism and stomatal regulation in two rubber clones ( Hevea brasiliensis Muell. Arg.)

Cited by 44 publications

References 27 publications

Responses to chilling of two Eucalyptus globulus clones with contrasting drought resistance

Responses to chilling of two Eucalyptus globulus clones with contrasting drought resistance

Photosynthetic water use efficiency in tree crowns of Shorea beccariana and Dryobalanops aromatica in a tropical rain forest in Sarawak, East Malaysia

How do rubber (Hevea brasiliensis) plantations behave under seasonal water stress in northeastern Thailand and central Cambodia?

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