Shade tolerance plays an important role in biomass production of different poplar genotypes in a high-density plantation

Wang, Ningning; Huang, Qinjun; Sun, Jingru; Sai, Yan; Ding, Changjun; Mei, Xindi; Li, Dan; Zeng, Xiaoyang; Su, Xiaohua; Shen, Yingbai

doi:10.1016/j.foreco.2014.06.046

Cited by 20 publications

(19 citation statements)

References 33 publications

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“…As described by Li et al (2014) and Wang et al (2014), all measurements were performed between 8:30 and 11:00 on sunny days. Photosynthetic parameters including net photosynthetic rate (P n ), stomatal conductance (G s ), intercellular CO 2 concentration (C i ), and transpiration rate (T r ) were recorded when the rate of CO 2 uptake was stable.…”

Section: Measurement Of Gas Exchangementioning

confidence: 99%

“…The diurnal changes in P n were measured in a leaf chamber with ambient CO 2 concentration under natural light using the portable photosynthesis system described above with the chamber temperature consistent with the ambient air temperature and not controlled, as described by Wang et al (2014). Measurements were made at 2 h intervals from 8:00 to 18:00, and an additional measurement was made at 7:00 on sunny days.…”

Section: Measurement Of Diurnal Changes In Photosynthesismentioning

confidence: 99%

“…Fully expanded functional leaves in the canopies were selected randomly for photosynthetic measurements in July 2014. All measurements were performed and repeated at least six times for each variety on sunny days according to the methods of Ding et al (2006) and Wang et al (2014).…”

Section: Introduced Plant Materials and Experimental Designmentioning

confidence: 99%

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Diurnal changes in photosynthesis in Sclerocarya birrea from South Africa and Israel after introduction and acclimatization in Wenshan, Yunnan Province, China

Ding²,

et al. 2015

South African Journal of Botany

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Photosynthetic activity is one of the most important indicators for evaluating the introduction and acclimatization of trees to new geographies. The aim of this study was to investigate the photosynthetic characteristics of marula [Sclerocarya birrea (A. Rich.) Hochst. subsp. caffra (Sond.) Kokwaro (Anacardiaceae)] and the environmental conditions relevant to its growth in China. We analyzed the diurnal dynamics of photosynthesis in two S. birrea varieties, one from South Africa and one from Israel, after introduction into China using a portable photosynthesis measuring system. Our results showed that the diurnal net photosynthetic rate (P n ) exhibited an atypical double-peak pattern that was influenced mainly by stomatal factors. Moreover, the diurnal change in stomatal conductance (G s ) was consistent with that for P n and showed an obvious double-peak curve, whereas the diurnal change in the transpiration rate (T r ) was opposite to that in intercellular CO 2 concentration (C i ), which presented a single-peak curve. The extreme values of the environmental factors we monitored occurred at approximately the same time of day and influenced photosynthesis by affecting C i , T r , and leaf temperature (T L ), with light intensity exerting an especially strong effect. The P n of the S. birrea variety from Israel was higher than that of the S. birrea variety from South Africa, while South Africa S. birrea exhibited superior growth trait in southern China. We suggest that the photosynthetic performance of S. birrea can be acclimated to a new environment.

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Section: Measurement Of Gas Exchangementioning

confidence: 99%

Section: Measurement Of Diurnal Changes In Photosynthesismentioning

confidence: 99%

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Diurnal changes in photosynthesis in Sclerocarya birrea from South Africa and Israel after introduction and acclimatization in Wenshan, Yunnan Province, China

Ding²,

et al. 2015

South African Journal of Botany

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“…PPFD intensity will prevent photosynthesis in the plant [21,22] . Consequently, plants can be classified as shade tolerant and shade intolerant [23] . Mashonjowa et al [24] reported that shading greenhouse by painting the greenhouse cover with lime-based whitewash (whitening) reduced the light transmission for photosynthetically active radiation, total solar and thermal radiation of the greenhouse cover from 0.75 to 0.53, 0.74 to 0.55 and 0.45 to 0.43, respectively.…”

mentioning

confidence: 99%

Influences of greenhouse-integrated semi-transparent photovoltaics on microclimate and lettuce growth

Hassanien

2017

International Journal of Agricultural and Biological Engineering

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Shading in greenhouses is a simple and cheap method usually used to reduce the intensity of solar radiation and air temperature. Moreover, combining Photovoltaic (PV) panels and crops on the same cropland could alleviate the increasing competition for the agricultural land between food and energy production. In addition, the integration of PV with greenhouses could reduce, or partially replace the energy consumption for greenhouse crop production. Therefore, the aim of this study was to investigate the shading effect of semi-transparent mono-crystalline silicon double glazing photovoltaic panels (STPV), mounted on top of an agricultural greenhouse, which occupied 20% of the roof area, on the microclimate conditions and the growth of lettuce plants inside a greenhouse. Results showed that the combination of STPV and polyethylene cover decreased the solar radiation by 35% to 40% compared to the use of polyethylene cover only for clear days which was in the acceptable range of photosynthetically active radiation for lettuce plants. Moreover, STPV shading decreases the air temperature by 1°C-3°C and had no effect in the relative humidity under natural ventilation. Furthermore, there were no significant differences (p0.05) in the growth of lettuce plants between the shaded greenhouse by the STPV and the unshaded. Shading insignificantly increased the fresh weight, leaf area and the chlorophyll contents (p0.05). In conclusion, the integration of STPV modules can decrease the solar irradiation and the internal air temperatures as well as generate electric energy for environmental control systems without significant influence on the growth of lettuce plants. Meanwhile, it can decrease the water consumption by decreasing the evapotranspiration rate.

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“…Light is the energy source of plants photosynthesis and light intensity has important influence on plant morphology, physiology and reproduction (Li et al, 2010;Kosma et al, 2013;Mauro et al, 2014;Wang et al, 2014). Response of soybean seed yield and yield components to solar radiation's quality and intensity have been researched (Myers et al, 1987;Board and Harvill et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

The shoot dry matter accumulation and vertical distribution of soybean yield or yield components in response to light enrichment and shading

Liu

Zhou

2015

Emir. J. Food Agric

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A two years field experiment was carried out to analyze the effects of light-enriched treatment and shading on shoot dry matter accumulation and vertical distribution of soybean seed yield or yield components. Light enrichment significantly increased shoot dry matter accumulation per plant to contrast with that of the natural light in 2-years. Under three different density condition, light enrichment averagely increased Hai339 (H339) shoot dry matter accumulation per plant by 43.2%; that of Heinong35 (HN35) by 40.1% and that of Kennong18 (KN18) by 28.7%. Compared with that of the ambient light, shade averagely decreased Hai339 (H339) shoot dry matter accumulation per plant by 33.6%; that of Heinong35 (HN35) by 29.2% and that of Kennong18 (KN18) by 41.7%. Most of yield and pod number was produced in the middle layer of the main stem. Seeds number per pod at middle layer also was more than lower and upper canopy layers. Light sensitivity of lower, middle and upper mainstem part from three soybean cultivars was very different. Compared with the other yield component, seed size was least affected by light treatment. In our experiment, seed size was mostly constant at lower, middle and upper stem layers, although the filling duration of seed produced lowermost node was longer approximate 18 days than that of seed produced uppermost node. Our data indicated that, through redistributing the assimilate at lower, middle and upper canopy layers, soybean plant could showed the mechanism to maintain seed size stable. Clarification of mechanisms responsible for dry matter accumulation and vertical distribution of yield components under different light treatments, may provide some reference for phenotypic improvement and cropping pattern.

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Shade tolerance plays an important role in biomass production of different poplar genotypes in a high-density plantation

Cited by 20 publications

References 33 publications

Diurnal changes in photosynthesis in Sclerocarya birrea from South Africa and Israel after introduction and acclimatization in Wenshan, Yunnan Province, China

Diurnal changes in photosynthesis in Sclerocarya birrea from South Africa and Israel after introduction and acclimatization in Wenshan, Yunnan Province, China

Influences of greenhouse-integrated semi-transparent photovoltaics on microclimate and lettuce growth

The shoot dry matter accumulation and vertical distribution of soybean yield or yield components in response to light enrichment and shading

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