Growth, gas exchange, and root respiration of Quercus rubra seedlings exposed to low root zone temperatures in solution culture

Apostol, Kent G.; Jacobs, Douglass F.; Wilson, Barrett C.; Salifu, K. Francis; Dumroese, R. Kasten

doi:10.1016/j.foreco.2007.04.054

Cited by 18 publications

(10 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a previous study, Wei et al (2012a) reported that a lower rate of the inorganic fertilizer treatment promoted seedling quality by enhancing N reserves. This conclusion was continuously strengthened in our study, likely due to more new root egress in the same treatment (Apostol et al 2007, Sloan & Jacobs 2008, Carles et al 2011. On the other hand, the nursery-applied organic amendment treatment also resulted in more new roots after transplant, which was attributed to better initial root quality as characterized by tap root length and lateral root number before transplant (Wei et al 2012a.…”

Section: Root Respiration and New Root Growthsupporting

confidence: 57%

“…Higher respiration rates of roots of posttransplant seedlings in the lower rate of the inorganic fertilizer treatment may resulted from a greater seedling N reserve (Druege et al 2000), which usually contributes to more new root egress (Cuesta et al 2010a(Cuesta et al , 2010b) because many critical functions during new root growth depend upon root respiration for an energy supply (Reich et al 1998, Apostol et al 2007). In a previous study, Wei et al (2012a) reported that a lower rate of the inorganic fertilizer treatment promoted seedling quality by enhancing N reserves.…”

Section: Root Respiration and New Root Growthmentioning

confidence: 99%

See 1 more Smart Citation

Carbohydrate metabolism during new root growth in transplanted Larix olgensis seedlings: post-transplant response to nursery-applied inorganic fertilizer and organic amendment

Wei¹,

Guo²

2017

iForest

View full text Add to dashboard Cite

Sustainable agriculture often requires the incorporation of organic matter into cultural protocols as an amendment to mitigate problems caused by chemical inputs, but the responses of transplanted seedlings to such additions have not been well quantified. In this study, bare-root Changbai larch (Larix olgensis Henry) seedlings were applied with 100 or 200 kg nitrogen (N) ha -1 of inorganic fertilizer with or without chicken manure added at a rate of 10,000 kg ha -1 during nursery cultivation, obtaining four treatment combinations designated as F100+, F200+, F100-, and F200-, respectively. Over-winter seedlings were transplanted into pots and placed in a growth chamber, where the carbohydrate metabolism, biomass accumulation, root respiration, and new root number were quantified. Both initial soluble sugar and total non-structural carbohydrate (TNC) accumulation were the lowest in the F100+ treatment. However, two months later, root soluble sugar content was the highest in this treatment, while coarse-root (diameter > 2mm) carbohydrate content was the highest in the low rate of inorganic fertilizer treatment. During the two-month post-transplant period, the net carbohydrate accumulation rate (NCAR) for starch was negative for all treatments, but the NCAR value for soluble sugars was the highest in the F100+ treatment at both the root and whole-plant scales. Relative to the F200-treatment, the NCAR value for soluble sugars, final sugar content, and biomass accumulation in coarse roots, respiration rate of fine roots (diameter ≤ 2 mm), and new root number were all greater in the F100+ treatment, while new root number was increased by organic matter additions. In conclusion, the use of chicken manure as an organic amendment had the potential to enhance transplanted larch seedling performance by improving post-transplant new root number, but this application must be considered within the context of the interaction between organic amendment treatments and inorganic fertilizer applications.

show abstract

Section: Root Respiration and New Root Growthsupporting

confidence: 57%

Section: Root Respiration and New Root Growthmentioning

confidence: 99%

Carbohydrate metabolism during new root growth in transplanted Larix olgensis seedlings: post-transplant response to nursery-applied inorganic fertilizer and organic amendment

Wei¹,

Guo²

2017

iForest

View full text Add to dashboard Cite

show abstract

“…A and CF were measured concurrently. Measurements were made at photosynthetic photon flux density (PPFD) of 500 µmol m −2 s −1 , reference CO 2 of 400 ppm, and flow rate at 500 µmol s −1 (Apostol et al, 2007), and leaf of temperature of 24 • C. Following enclosure in the leaf cuvette, data were logged when a leaf reached a steady-state value, defined as photosynthesis, conductivity, and sample water with slopes less than 0.5, 0.01, and 1, respectively, for 20 s.…”

Section: Net Photosynthesis and Chlorophyll Fluorescencementioning

confidence: 99%

Winter variation in physiological status of cold stored and freshly lifted semi-evergreen Quercus nigra seedlings

et al. 2009

Self Cite

View full text Add to dashboard Cite

Keywords:chlorophyll fluorescence / cold hardiness / electrolyte leakage / LT 50 / net photosynthesis / tardily deciduous / transplant stress / water oak Abstract • Water oak (Quercus nigra L.) is a tardily deciduous species commonly planted in afforestation projects in the Lower Mississippi River Alluvial Valley, USA. Field performance is often marked by low survival rates and top dieback, which may be associated with poor physiological quality of planting stock.• We investigated physiological status of cold stored (2-4 • C; CS) and freshly lifted (FL) seedlings during the period between lifting and planting (December -February). In mid-February, seedlings were transplanted into a controlled greenhouse environment for 90 d to evaluate post-transplant growth performance.• Net photosynthetic rates were positive until late January (generally greater in CS seedlings) and became negative thereafter. FL seedlings generally had lower LT 50 values from freeze-induced electrolyte leakage (FIEL), reflecting greater cold hardiness. FIEL of foliage provided the best indicator of physiological status, though terminal buds may serve as a suitable substitute. All seedlings experienced top dieback following transplant; CS seedlings had less relative root-collar diameter, height, and root volume increments.• Cold storing seedlings did not appear to prolong dormancy, increase stress resistance, or hold promise as a means to improve outplanting success. Regardless of storage regime, seedlings appeared to be most cold hardy and perhaps stress resistant until late January. • Quercus nigra L. est une espèce semi décidue, plantée dans les projets de reboisement dans la Basse vallée alluviale du fleuve Mississippi aux Etats-Unis. Les performances en plantation sont souvent marquées par un faible taux de survie et un dépérissement de la flèche du plant, ce qui peut être associé à leur mauvaise qualité physiologique. Mots-clés• Nous avons étudié l'état physiologique de jeunes plants stockés au froid (2-4 • C ; CS) et récemment arrachés (FL), au cours de la période entre l'arrachage et la plantation (Décembre -Février). À la mifévrier, les plants ont été transplantés pour 90 jours dans une serre climatiquement contrôlée, pour évaluer les performances concernant la croissance après transplantation.• Les taux de photosynthèse nette ont été positifs jusqu'à la fin janvier (généralement plus élevés pour les jeunes plants CS) et sont devenus négatifs par la suite. Les plants FL ont eu généralement des valeurs LT50 inférieures de perte d'électrolyte induit par le gel (FIEL), reflétant une plus grande tolérance au froid. Le FIEL du feuillage fourni le meilleur indicateur de l'état physiologique, même si les bourgeons terminaux peuvent servir comme un substitut approprié. Tous les plants on présenté une perte des feuilles de la flèche à la suite de la transplantation ; les plants CS avaient un rapport relatif racine-diamètre du collet, une hauteur, et des accroissements du volume de racines, moindres. (2009) 103 R.C. Goodman et al.• Le stockage...

show abstract

“…All measurements were made at PPFD of 350 μmol m −2 s −1 , reference CO 2 concentration of 400 μmol m −2 s −1 , leaf temperature of 28°C, RH of 55-60%, and flow rate at 500 μmol s −1 . Following enclosure in the leaf cuvette, data was logged when a leaf reached a steady-state value (coefficient of variations of CO 2 and H 2 O within the chamber was <0.25%) as described by Apostol et al (2007). Leaf area was determined with an LI-6200 leaf area meter (LI-COR, Lincoln, NE, USA) and tissue dry mass was obtained after oven-drying at 70°C for 72 h.…”

Section: Measurementsmentioning

confidence: 99%

Root desiccation and drought stress responses of bareroot Quercus rubra seedlings treated with a hydrophilic polymer root dip

2008

Self Cite

View full text Add to dashboard Cite

Root hydrogel, a hydrophilic polymer, has been used to improve transplanting success of bareroot conifer seedlings through effects on water holding capacity. We examined mechanisms by which Terra-sorb® Fine Hydrogel reduces damage that occurs when roots of 1-year old, dormant northern red oak (Quercus rubra L.) were subjected to shortterm (1, 3, and 5 h) pre-transplanting desiccation and long-term (45 days) drought stress following transplanting in a controlled environment chamber or greenhouse conditions. Hydrogel-treated seedlings had 80% greater root moisture content than non-root dipped control seedlings following the pre-transplanting desiccation period. Hydrogel reduced root membrane leakiness by 31% 5 h after the desiccation exposure. Hydrogel-treated seedlings did not show greater differences in shoot length, plant dry mass, root volume, net photosynthesis, and stomatal conductance compared with control seedlings following the 45-day drought stress exposure. A reduction in mean number of days to bud break in hydrogel-treated seedlings, combined with delayed tissue moisture loss (linked to higher stem water potential), suggests that hydrogel may have provided stress protection to aid survival under short-term desiccation, which may be beneficial toward alleviating initial transplanting stress.

show abstract

Growth, gas exchange, and root respiration of Quercus rubra seedlings exposed to low root zone temperatures in solution culture

Cited by 18 publications

References 31 publications

Carbohydrate metabolism during new root growth in transplanted Larix olgensis seedlings: post-transplant response to nursery-applied inorganic fertilizer and organic amendment

Carbohydrate metabolism during new root growth in transplanted Larix olgensis seedlings: post-transplant response to nursery-applied inorganic fertilizer and organic amendment

Winter variation in physiological status of cold stored and freshly lifted semi-evergreen Quercus nigra seedlings

Root desiccation and drought stress responses of bareroot Quercus rubra seedlings treated with a hydrophilic polymer root dip

Contact Info

Product

Resources

About