Photosynthesis and photoassimilate transport during root hypoxia in Melaleuca cajuputi, a flood-tolerant species, and in Eucalyptus camaldulensis, a moderately flood-tolerant species

Kogawara, Satoshi; Yamanoshita, Takashi; Norisada, Mariko; Masumori, Masaya; Kojima, Kôhei

doi:10.1093/treephys/26.11.1413

Cited by 47 publications

(55 citation statements)

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“…Reduced mobilization of shoot starch reserves in soil moisture stress may have been due to reduced translocation rate. Kogawara et al (2006) reported reduced transport of photoassimilates and starch accumulation in leaves of Eucalyptus camaldulensis Dehnh 4 days after hypoxic treatment.…”

Section: Lar and Lccmentioning

confidence: 95%

“…Rate of photoassimilate transport to roots can decrease during flooding resulting in accumulation of starch in leaves (Kogawara et al 2006). Short periods of flooding followed by draining can result in a slow recovery of preflooded-photosynthetic rates as stomata reopen (Kozlowski and Pallardy 1997;Li et al 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Partitioning of carbohydrates in roots can be affected by flooding, with greater allocation to storage, and less allocation to biomass and metabolism (Kogawara et al 2006). A 42% decline in NSC was found following early-fall floods of 3 to 27 days in American cranberry (Vaccinium macrocarpon Ait.…”

Section: Introductionmentioning

confidence: 99%

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Responses of nonstructural carbohydrates to shoot removal and soil moisture treatments in Salix nigra

Carpenter

Pezeshki

Shields

2008

Trees

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Aboveground disturbances are common in dynamic riparian environments, and Salix nigra is well adapted with a vigorous resprouting response. Soil moisture stresses are also common, and S. nigra is flood tolerant and drought sensitive. The objective of this study was to quantify nonstructural carbohydrate (NSC) reserves in S. nigra following shoot removal and soil moisture treatments. NSC reserves provide energy for regeneration of shoot tissue until new functional leaves are developed. Three soil moisture treatments: well-watered (W), periodic flooding (F) and drought (D); and three shoot removal treatments: no shoots removed (R0), partial shoot removal (R1), and complete shoot removal (R2) were applied. Plants were harvested when new shoot development was observed (day 13). Statistical significance in the 3 9 3-factorial design was determined in two-factor ANOVA at P \ 0.05. Both roots and cuttings were important reservoirs for NSC during resprouting response, with decreases in root (31%) and cutting (14%) biomass in R2 compared to R0. Rapid recovery of photosynthetic surface area (from 15 to 37% of R0) was found in R1. A clear pattern of starch mobilization was found in roots in R0, R1 and R2, with lowest root starch concentration in W, F higher than W, and D higher than F. Shoot starch concentration was lower in F and D compared to W in R0, however, in R1 shoot starch was reduced in W compared to F and D, possibly indicating reduced rates of translocation during soil moisture stress. Evidence of osmotic adjustment was found in roots and shoots with higher total ethanol-soluble carbohydrates (TESC) during soil moisture stress in F and D treatments. Total plant NSC pool was greater in F and D treatments compared to W, and progressively reduced from R0 to R1 to R2. Results indicated negative effects of drought, and to a lesser extent periodic flooding on resprouting response in S. nigra, with implications for reduced survival when exposed to combined stresses of aboveground disturbance and soil moisture.

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Section: Lar and Lccmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Responses of nonstructural carbohydrates to shoot removal and soil moisture treatments in Salix nigra

Carpenter

Pezeshki

Shields

2008

Trees

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“…The activity of Alcohol dehydrogenase (ADH; EC 1.1.1.1) was quantified using the method of Kogawara et al (2006). The reaction mixture contained 50 mmol L -1 Tris-HCl (pH 8.0), 2 mmol L -1 DTT, 0.25 mmol L -1 NAD + , 30 µL of the enzyme extract, and 5 % ethanol.…”

Section: Hypoxia-responsive Enzyme Activitymentioning

confidence: 99%

Physiological Responses to Hypoxia and Manganese in Eucalyptus Clones with Differential Tolerance to Vale do Rio Doce Shoot Dieback

Harguindeguy

Castro

Novais

et al. 2018

Rev. Bras. Ciênc. Solo

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ABSTRACT:Vale do Rio Doce shoot dieback (VRDSD) is an anomaly whose cause seems to be associated with hypoxic conditions and their consequences (excess Mn and Fe) triggered by elevation of the water table in areas with poor drainage. Different plants have distinct survival strategies under this form of stress. The objective of this study was to understand the physiological responses involved in the differential tolerance of eucalyptus clones to VRDSD and their relationship to hypoxia and excess Mn. A hydroponic experiment was carried out using a 2 × 2 × 2 factorial arrangement, two eucalyptus clones with different levels of tolerance to VRDSD (sensitive Urograndis hybrid -1213; and the tolerant Rio Claro hybrid -Eucalyptus grandis x unknown -2719), two concentrations of O 2 (8 and 4 mg L -1 ), and two Mn concentrations (1.39 and 300 mg L -1 ) in a randomized block design (RBD) with three replicates. Forty-day-old clones were maintained in Clark nutrient solution for 30 days. After this period, the treatments were applied for 11 days. Plant gaseous exchange shoot and root production, and the quantity of enzymes related to oxidative stress in leaves and roots were evaluated. In the tolerant clone, reactive oxygen species (ROS) were produced under hypoxic conditions, accompanied by reduction in production of dry matter, malondialdehyde (MDA), and in activity of the enzyme alcohol dehydrogenase (ADH). However, this clone had greater production of superoxide dismutase (SOD) under these conditions, an enzyme responsible for detoxification of ROS, which acts as part of the Low Oxygen Quiescence Syndrome (LOQS). In contrast, sensitive clones did not exhibit expressive reductions in growth or changes in the leaf/root ratio. These clones formed large quantities of adventitious roots and had high levels of MDA and ADH and low levels of SOD. Therefore, sensitive clones appear not to be prepared for detoxification of ROS and other toxic metabolites, but rather adopt morphological escape mechanisms, the Low Oxygen Escape Syndrome (LOES), in response to hypoxia. Thus, the period of soil waterlogging may cause the death of large numbers of roots in sensitive clones, limiting their ability to absorb water and nutrients and culminating in the death of these plants. Excess Mn seems to aggravate the damage caused by hypoxia, but it is not the causal agent of VRDSD.

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“…BSP), Scots pine) (cf. Islam and Macdonald 2004;Sudachkova et al 2009;Repo et al 2016a) and broad-leaved species (White oak (Quercus alba L.), river red gum (Eucalyptus camaldulensis) (Gravatt and Kirby 1998;Kogawara et al 2006). In addition, the starch content in the leaves of pubescent birch was not affected by GW.…”

Section: Water Relations Photosynthesis and Carbohydratesmentioning

confidence: 99%

Effect of waterlogging on boreal forest tree seedlings during dormancy and early growing season

Wang¹

2017

Diss. For.

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More precipitation in the form of rain in winter together with deteriorated ditch networks may expose drained peatland forestry to winter or spring waterlogging in boreal forests. The response of main boreal forest species on soil waterlogging is important for predicting forest productivity and justifying the demand for ditch network maintenance. In this study, the aim was to find out the physiological and growth responses of 1-year-old Norway spruce (Picea abies (L.) Karst.), silver birch (Betula pendula Roth) and pubescent birch (Betula pubescens Ehrh.) seedlings subjected to one-month waterlogging at the end of the dormancy phase, and to find out the morphology, physiology and growth of silver birch and pubescent birch seedlings subjected to one-month waterlogging at the beginning of the growing season.Two experiments were carried out in growth chambers. In experiment 1, Norway spruce seedlings were subjected to either no waterlogging or waterlogging for one month at 2 o C, after which a six-week follow-up growing season allowed the seedlings to recover. In experiment 2, silver birch and pubescent birch seedlings went through a four-week dormancy (weeks 1-4), a four-week early growing season (weeks 5-8), and a four-week late growing season (weeks 9-12). The treatments were 1) no waterlogging throughout the experiment (NW); 2) four-week waterlogging during dormancy (Dormancy waterlogging, DW); 3) four-week waterlogging during the early growing season (Growth waterlogging, GW); and 4) four-week dormancy waterlogging followed by four-week growth waterlogging during the early growing season (DWGW).Dormancy waterlogging reduced root volume and increased root mortality, but did not affect dark-acclimated chlorophyll fluorescence (F v /F m ) or the biomass of leaves, stems and roots in Norway spruce. Root biomass and root hydraulic conductance (K r ) of silver birch was reduced but aboveground organs were not affected by dormancy waterlogging. On the contrary, in pubescent birch root morphology, biomass and K r were not affected, but gas exchange was reduced by dormancy waterlogging. However, the biomass of leaves and stems was not negatively affected in pubescent birch. In conclusion, these tree species can tolerate a one-month winter waterlogging well.Growth waterlogging led to the reduction of stomatal conductance (g s ), and thus the reduction of light-saturated photosynthesis rate (A max ) in both birch species, although recovery was seen during the follow-up growing season. It also led to lower leaf area in both birch species. Growth waterlogging led also to decreased the K, Ca, Mg, Mn and B contents of leaves in silver birch, whereas in pubescent birch only Ca and Mg contents were decreased. In pubescent birch, fine cluster roots, the incidence of non-glandular trichomes, and stem lenticels were increased by growth waterlogging. However, silver birch did not show such acclimation to waterlogging. In conclusion, growth waterlogging caused more negative effects to both birch species than dormancy waterl...

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Photosynthesis and photoassimilate transport during root hypoxia in Melaleuca cajuputi, a flood-tolerant species, and in Eucalyptus camaldulensis, a moderately flood-tolerant species

Cited by 47 publications

References 46 publications

Responses of nonstructural carbohydrates to shoot removal and soil moisture treatments in Salix nigra

Responses of nonstructural carbohydrates to shoot removal and soil moisture treatments in Salix nigra

Physiological Responses to Hypoxia and Manganese in Eucalyptus Clones with Differential Tolerance to Vale do Rio Doce Shoot Dieback

Effect of waterlogging on boreal forest tree seedlings during dormancy and early growing season

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