Responses in the morphology, physiology and biochemistry of Taxus chinensis var. mairei grown under supplementary UV-B radiation

Zu, Yuangang; Hai-He, Pang; Yu, Jinghua; Li, Dewen; Wei, X. X.; Gao, Yinxiang; Tong, Lu

doi:10.1016/j.jphotobiol.2009.12.001

Cited by 75 publications

(51 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar course of changes in Chl a/b ratio to that observed by our group in T. baccata was also present in Piper betle L. (Kumar et al, 2006) for which it reached the highest value in November (that is a month earlier than T. baccata observed by our group), and these values were slightly higher for male in comparison to female individuals. Higher value of Chl a/b ratio in male individuals may be caused by a higher degree of conversion of Chl b into Chl a by specific enzymes (Folly & Engel, 1999;Scheumann et al, 1999) or higher membrane sensitivity (Zu et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Seasonal fluctuations of photosynthetic pigments content in Taxus baccata needles

Zarek¹

2016

Dendrobiology

View full text Add to dashboard Cite

Yew is a coniferous, evergreen, dioecious species. The objective of the study was to present a comprehensive characteristic of changes occurring throughout the year in terms of the content of photosynthetic pigments and related compounds in the needles of yew, depending on the sex of individuals and age of needles. Eight compounds, particularly chlorophyll a (Chl a), chlorophyll b (Chl b), carotenoids (Car), protoporphyrin IX (PPIX), magnesium protoporphyrin IX (MgPPIX), protochlorophyllide (Pchlide), chlorophyllide a (Chlide a), and chlorophyllide b (Chlide b), were subjected to quantitative analysis. Based on the several parameters under study, significant differences between male and female individuals were observed, while most commonly, the largest differences were reported in the autumn and winter period. They were related to the content of Chl a, Chl b and Chl/Car ratio. The remaining compounds showed no significant differences according to the sex and were slightly different only in single periods. For all the studied parameters except for Chl/Car ratio, interaction between sampling dates and sex was not statistically significant. Significant differences between the needles of different age were observed only in terms of the content of Chl b, MgPPIX, Pchlide, Chlide b, and Chl a/b ratio, and these differences were always caused by the current-year needles.

show abstract

Section: Discussionmentioning

confidence: 99%

“…According to Zu et al (2010), increase in Chl a/b ratio may be caused by the increasing degree of decomposition of grana containing photosystem PSII.…”

Section: Discussionmentioning

confidence: 99%

Seasonal fluctuations of photosynthetic pigments content in Taxus baccata needles

Zarek¹

2016

Dendrobiology

View full text Add to dashboard Cite

show abstract

“…Cd and UV-B either alone or in combination influenced antioxidative enzyme activities depending on species, exposure time, and dose (Prasad et al 2004;Agrawal and Mishra 2009;Zu et al 2010). Prasad et al (2005) observed that Cd+UV-B further enhanced the activity of SOD and CAT, and they suggested that both the stresses together exhibited synergistic effects.…”

Section: Discussionmentioning

confidence: 99%

Changes in photosynthesis, antioxidant enzymes and lipid peroxidation in soybean seedlings exposed to UV-B radiation and/or Cd

Zhang

et al. 2011

Plant Soil

View full text Add to dashboard Cite

show abstract

“…Under UV-B radiation stress, SOD is transformed to generate H 2 O 2 by a disproportionation process of O 2·− , which is accompanied by an increase in the H 2 O 2 content and the removal of POD and CAT as well as a decrease in the activity of the H 2 O 2 decomposition enzyme [50]. Meanwhile, NO promotes the activities of SOD, POD, and CAT and leads to an increase in the defensive ability of the free radical defense system.…”

Section: Discussionmentioning

confidence: 99%

Protective Effect of Nitric Oxide (NO) against Oxidative Damage in Larix gmelinii Seedlings under Ultraviolet-B Irradiation

Zhou

Sun

et al. 2016

Forests

View full text Add to dashboard Cite

Ultraviolet-B (UV-B) stress appears to be more striking than other research works because of the thin ozone layer. The protective influence of an exogenous nitric oxide donor and sodium nitroprusside (SNP) on the growth properties of Larix gmelinii seedlings was investigated under ultraviolet-B radiation conditions. The results indicated that 0.1 mM SNP could effectively alleviate the damage caused by ultraviolet-B radiation, and improved the seedling growth properties, the relative water content, and photosynthetic pigment content in leaves. Additionally, the photosynthetic capacity and antioxidant enzyme activity were increased during the exposure. On the contrary, the damage caused by active oxygen was decreased in SNP-treated seedling leaves. The damage caused by ultraviolet-B radiation was slightly reduced after treating with 0.01 mM SNP. Nevertheless, treatment with 0.5 mM SNP had a negative effect under ultraviolet-B radiation. Furthermore, supplementing NO (nitric oxide) improved the photosynthetic capacity and antioxidant enzyme activity and alleviated the damage of caused by active oxygen. The best effective concentration of SNP was 0.1 mM. Therefore, a suitable amount of exogenous NO can protect the Larix gmelinii seedlings and increase their tolerance to ultraviolet-B radiation.

show abstract

Responses in the morphology, physiology and biochemistry of Taxus chinensis var. mairei grown under supplementary UV-B radiation

Cited by 75 publications

References 43 publications

Seasonal fluctuations of photosynthetic pigments content in Taxus baccata needles

Seasonal fluctuations of photosynthetic pigments content in Taxus baccata needles

Changes in photosynthesis, antioxidant enzymes and lipid peroxidation in soybean seedlings exposed to UV-B radiation and/or Cd

Protective Effect of Nitric Oxide (NO) against Oxidative Damage in Larix gmelinii Seedlings under Ultraviolet-B Irradiation

Contact Info

Product

Resources

About