Effects of light stress on the growth of the epiphytic orchid Cattleya forbesii Lindl. X Laelia tenebrosa Rolfe

Stancato, Giulio Cesare; Mazzafera, Paulo; Buckeridge, Marcos Silveira

doi:10.1590/s0100-84042002000200011

Cited by 21 publications

(16 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Both the leaves and roots of P. amabilis are rich in carbohydrates (soluble and starch) that may allow their re-mobilization under certain culture and propagation conditions. Stancato et al (2002), using pseudobulbs of Cattleya forbessii Lindl. × Laelia tenebrosa Rolf.…”

Section: Discussionmentioning

confidence: 99%

Effects of auxins on in vitro reserve compounds of Phalaenopsis amabilis (Orchidaceae)

Ori¹,

Chu²,

Tavares³

2014

Afr. J. Biotechnol.

View full text Add to dashboard Cite

The effects of auxin and the endogenous levels of reserve compounds of Phalaenopsis amabilis (L.) Blume (Orchidaceae) were analyzed in vitro. Rootless plants were inoculated in modified MS media supplemented with IBA or NAA (0.0, 0.2, 1.0 and 5.0 mg L -1 ) and with 2,4-D (0.000, 0.032, 0.160 and 0.800 mg L -1 ). The biochemical parameters of endogenous levels of soluble carbohydrates and starch and of total soluble protein in roots, leaves and shoots were analyzed after 30 and 120 days. Carbohydrate levels in leaves showed similar patterns for all treatments. At 30 days, there was an increase in the endogenous carbohydrate level along with an increase in the concentration of auxins. At 120 days, the endogenous carbohydrate level in leaves had decreased, while the auxin concentration had continued to increase, demonstrating the mobilization of the carbohydrates. The leaf carbohydrate levels decreased from day 30 to 120; for both IBA and 2,4-D treatments, there was starch accumulation in roots as a function of the collection date. The 2,4-D concentration of 0.0032 mg L -1 decreased the level of total soluble protein in roots. The in vitro plants exhibit different growth patterns depending on the classes and concentrations of growth regulators. Biochemical analyses exhibited that metabolic activity and the degradation and accumulation of substances occurs in leaves, roots and shoots, demonstrating that roots contribute to the maintenance of plant metabolism and also act as reserve organs, even in epiphytic plants.

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of auxins on in vitro reserve compounds of Phalaenopsis amabilis (Orchidaceae)

Ori¹,

Chu²,

Tavares³

2014

Afr. J. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…PS II damage reflected stress in a leaf of plant (Larcher, 2003). Moreover, growth may decline when placed under low lights (Hassan et al, 2010) while in epiphytic orchid plants, growth was decline due to photoinhibition (Stancato et al, 2002). In relation to this, it was suggested that chlorophyll fluorescence could detect the effect stress then followed by physical symptom of the deterioration on plants (Naumann et al, 2008;Percival and Sheriffs, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Chlorophyll fluorescence technique was also reported as a good indicator in determining the stress response. Moreover, extremely excessive light received by plants possibly will damage photosynthetic pigments and structure of plants thykaloid which leads to photodamage (Larcher, 2003) and definitely occurrence of photoinhibition (Stancato et al, 2002). From this, it is vital to know that such exposure to extreme condition as they were subjected to light stress would affect the epiphytic ferns of P. bifurcatum in terms of their physiological attributes.…”

Section: Introductionmentioning

confidence: 99%

Leaf Chlorophyll Fluorescence and Gas Exchange Response to Different Light Levels in <i>Platycerium bifurcatum<i/>

Sanusi¹,

Nuruddin²,

Hamid³

2011

American Journal of Agricultural and Biological Sciences

View full text Add to dashboard Cite

Problem statement: Platycerium bifurcatum (Cav.) C. Chr. is epiphytes which lives in forest canopy and commonly used for its ornamental value. In these environments, they were always exposed to many types of stresses such as high light intensity. Light intensity plays an important role in affecting plant's physiological performance. Therefore, the purpose of this study was to investigate physiological responses of P. bifurcatum to light stress. Approach: In this study, P. bifurcatum were grown under four different Photosynthetic Active Radiation (PAR) levels which were 20 µmol mT3) and 1500 µmol m −2 s −1 (T4). Leaf gas exchange and chlorophyll fluorescence were used to evaluate the stress response of various levels of light intensity. All measurements were carried out on weekly basis for twelve weeks. Results: Results showed that A net value of T1, T2 and T3 in the range near to the average A net value for most epiphytes. Conversely, T4 showed lower value in A net with 1.797 µmol CO 2 m −2 s −1 . Fv/Fm ratio in T3 and T4 were below 0.8indicates that there was a sign of stress occurred in these treatments. However A net of T3 was not affected although there have been event of photoinhibition observed in the treatment. On the contrary, T4 was fully affected by high light intensity as there was a reduction of Fv/Fm ratio and also A net . T1 and T2 of A net and Fv/Fm ratio values ranged of unstressed plants after subjected to light treatment. Conclusion: Measurement of leaf chlorophyll fluorescence and gas exchange are useful to detection of light stress in P. bifurcatum. Different levels of light intensity were significantly affecting physiological attributes of P. bifurcatum.

show abstract

“…and other orchid's species commonly grow under open shade area. From the result know that light intensity interfered with growth and development of these orchids (Stancato et al 2002). Table 7.…”

Section: Sunlight Intensitymentioning

confidence: 97%

Inventory and habitat study of orchids species in Lamedai Nature Reserve, Kolaka, Southeast Sulawesi

Lestari

Santoso

2010

Biodiversitas

View full text Add to dashboard Cite

Lestari DA, Santoso W (2011) Inventory and habitat study of orchids species in Lamedai Nature Reserve, Kolaka,. Orchid is one of the ornamental plants which have been high commercial value. Therefore, orchid often has been over exploitation. Finally, some of orchid species are becoming threatened or even endangered. Purwodadi Botanical Garden as an institute of ex-situ conservation play role with it. The aim of this research is to inventory orchid's species in Lamedai Nature Reserve, Kolaka, Southeast Sulawesi by explorative method. Observation for habitat study was focused on some ecological factors supported to orchids growth like host tree, zone growth on host tree, abundance of sunlight, thickness of substrate (moss), orchid species and number of individual species. The result showed that there were 27 orchids species, consist of, 25 species (16 genera) epiphytic orchid and 2 species terrestrial orchid such as Eulophia keithii var. celebica and Goodyera rubicunda (Blume) Lindl. The host preference for the epiphytic orchid is the group of Myrtaceae family like Syzygium sp., Metrosideros vera Niederen and Metrosideros sp. They mostly grow on the main stem of the tree zone 1 on thick substrate (moss) and get a little abundance of sunlight (calm).

show abstract

Effects of light stress on the growth of the epiphytic orchid Cattleya forbesii Lindl. X Laelia tenebrosa Rolfe

Cited by 21 publications

References 20 publications

Effects of auxins on in vitro reserve compounds of Phalaenopsis amabilis (Orchidaceae)

Effects of auxins on in vitro reserve compounds of Phalaenopsis amabilis (Orchidaceae)

Leaf Chlorophyll Fluorescence and Gas Exchange Response to Different Light Levels in <i>Platycerium bifurcatum<i/>

Inventory and habitat study of orchids species in Lamedai Nature Reserve, Kolaka, Southeast Sulawesi

Contact Info

Product

Resources

About