scholarly journals Experimental Studies on the Effects of Ozone on Growth and Photosynthetic Activity of Japanese Forest Tree Species

2011 ◽  
Vol 5 (2) ◽  
pp. 65-78 ◽  
Author(s):  
Masahiro Yamaguchi ◽  
Makoto Watanabe ◽  
Hideyuki Matsumura ◽  
Yoshihisa Kohno ◽  
Takeshi Izuta
Keyword(s):  
Tree Species ◽  
Photosynthetic Activity ◽  
Experimental Studies ◽  
Forest Tree ◽  
Forest Tree Species ◽  
Japanese Forest

Effectiveness of the photochemical reflectance index to track photosynthetic activity over a range of forest tree species and plant water statuses

2011 ◽  
Vol 38 (3) ◽  
pp. 177 ◽  
Author(s):  
F. Ripullone ◽  
A. R. Rivelli ◽  
R. Baraldi ◽  
R. Guarini ◽  
R. Guerrieri ◽  
...  
Keyword(s):  
Tree Species ◽  
Photosynthetic Activity ◽  
Photochemical Efficiency ◽  
Resistance Index ◽  
Strong Relationship ◽  
Forest Tree ◽  
Co2 Assimilation ◽  
Severe Drought ◽  
Forest Tree Species ◽  
Single Tree

In this study, we investigated the potential of the photochemical resistance index (PRI) to track photosynthetic activity under water stress conditions by measuring PRI, leaf fluorescence, the xanthophyll cycle and photosynthetic activity in different forest tree species subjected to progressive drought. The PRI declined with pre-dawn water potential and a significant relationship between PRI and the xanthophyll de-epoxidation state (DEPS) was observed, although with large interspecific variability in the sensitivity of PRI to changes in DEPS. For single tree species, a strong relationship was observed on either PRI light saturated photosynthesis or PRI maximum photochemical efficiency of PSII (ΔF/Fm′); a larger variability in both relationships was apparent when data from different species were pooled together. However, an improved correlation was shown only in the former relationship by plotting the ΔPRI (dawn PRI minus the midday PRI values). Thus, we conclude that PRI is able to provide a good estimate of maximum CO2 assimilation at saturating light and ΔF/Fm′ for single tree species, despite the severe drought conditions applied. PRI should be applied more cautiously when dealing with multispecific forests because of confounding factors such as the strong interspecific differences in the initial value of PRI and in the sensitivity of PRI to changes in DEPS in response to drought.

Effects of sulfur dioxide on growth and net photosynthesis of six Japanese forest tree species grown under different nitrogen loads

Trees ◽  
2012 ◽  
Vol 26 (6) ◽  
pp. 1859-1874 ◽  
Author(s):  
Masahiro Yamaguchi ◽  
Makoto Watanabe ◽  
Chikako Tabe ◽  
Junichi Naba ◽  
Hideyuki Matsumura ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Tree Species ◽  
Net Photosynthesis ◽  
Forest Tree ◽  
Forest Tree Species ◽  
Nitrogen Loads ◽  
Japanese Forest

A case of gender equality: absence of sex-related costs in a dioecious tropical forest tree species

Plant Ecology ◽  
2021 ◽  
Author(s):  
Valéria Forni Martins ◽  
Rafaela Letícia Brito Bispo ◽  
Priscilla de Paula Loiola
Keyword(s):  
Tropical Forest ◽  
Gender Equality ◽  
Tree Species ◽  
Forest Tree ◽  
Forest Tree Species

scholarly journals Fire suppression and seed dispersal play critical roles in the establishment of tropical forest tree species in southeastern Africa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tomohiro Fujita
Keyword(s):  
Seed Dispersal ◽  
Tree Species ◽  
Seedling Survival ◽  
Fire Suppression ◽  
Forest Tree ◽  
Tree Seedlings ◽  
Seedling Mortality ◽  
Forest Tree Species ◽  
Seed Deposition ◽  
Syzygium Guineense

AbstractThis study examined the mechanisms of facilitation and importance of seed dispersal during establishment of forest tree species in an Afrotropical woodland. Seedling survival of Syzygium guineense ssp. afromontanum was monitored for 2.5 years at four different microsites in savannah woodland in Malawi (southeastern Africa) under Ficus natalensis (a potential nurse plant), Brachystegia floribunda (a woodland tree), Uapaca kirkiana (a woodland tree), and at a treeless site. The number of naturally established forest tree seedlings in the woodland was also counted. Additionally, S. guineense ssp. afromontanum seed deposition was monitored at the four microsites. Insect damage (9% of the total cause of mortality) and trampling by ungulates (1%) had limited impact on seedling survival in this area. Fire (43%) was found to be the most important cause of seedling mortality and fire induced mortality was especially high under U. kirkiana (74%) and at treeless site (51%). The rate was comparatively low under F. natalensis (4%) and B. floribunda (23%), where fire is thought to be inhibited due to the lack of light-demanding C4 grasses. Consequently, seedling survival under F. natalensis and B. floribunda was higher compared with the other two microsites. The seedling survival rate was similar under F. natalensis (57%) and B. floribunda (59%). However, only a few S. guineense ssp. afromontanum seedlings naturally established under B. floribunda (25/285) whereas many seedlings established under F. natalensis (146/285). These findings indicate that the facilitative mechanism of fire suppression is not the only factor affecting establishment. The seed deposition investigation revealed that most of the seeds (85%) were deposited under F. natalensis. As such, these findings suggest that in addition to fire suppression, dispersal limitations also play a role in forest-savannah dynamics in this region, especially at the community level.

Evaluating the effects of forest tree species on rill detachment capacity in a semi-arid environment

2021 ◽  
Vol 161 ◽  
pp. 106158
Author(s):  
Misagh Parhizkar ◽  
Mahmood Shabanpour ◽  
Isabel Miralles ◽  
Artemio Cerdà ◽  
Nobuaki Tanaka ◽  
...  
Keyword(s):  
Tree Species ◽  
Arid Environment ◽  
Forest Tree ◽  
Forest Tree Species ◽  
Semi Arid

The significance of xanthophylls and tocopherols in photo-oxidative stress and photoprotection of three Canarian laurel forest tree species on a high radiation day

2001 ◽  
Vol 158 (12) ◽  
pp. 1547-1554 ◽  
Author(s):  
Agueda María González-Rodríguez ◽  
Michael Tausz ◽  
Astrid Wonisch ◽  
María Soledad Jiménez ◽  
Dieter Grill ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Tree Species ◽  
Forest Tree ◽  
High Radiation ◽  
Laurel Forest ◽  
Forest Tree Species
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