A comparative analysis of photosynthetic characteristics of hulless barley at two altitudes on the Tibetan Plateau

Fan, Yuzhen; Zhong, Zhangcheng; Zhang, X. Z.

doi:10.1007/s11099-011-0016-0

Cited by 8 publications

(5 citation statements)

References 41 publications

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“…The measurements took place at the middle of the ear leaf during normal weather conditions with sunshine and no rain in summer, between 9:00–12:00 in the morning. Based on the literatures [ 28 – 30 ] and the actual circumstances, the conditions supported were as follows: photosynthetic photon flux density of 1800 μmol m -2 s -1 , CO 2 concentration of 400 μmol mol -1 , air temperature of 30°C and relative air humidity of 0% (0% moisture from air to the leaf chamber).…”

Section: Methodsmentioning

confidence: 99%

Row Ratios of Intercropping Maize and Soybean Can Affect Agronomic Efficiency of the System and Subsequent Wheat

et al. 2015

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Intercropping is regarded as an important agricultural practice to improve crop production and environmental quality in the regions with intensive agricultural production, e.g., northern China. To optimize agronomic advantage of maize (Zea mays L.) and soybean (Glycine max L.) intercropping system compared to monoculture of maize, two sequential experiments were conducted. Experiment 1 was to screening the optimal cropping system in summer that had the highest yields and economic benefits, and Experiment 2 was to identify the optimum row ratio of the intercrops selected from Experiment 1. Results of Experiment 1 showed that maize intercropping with soybean (maize || soybean) was the optimal cropping system in summer. Compared to conventional monoculture of maize, maize || soybean had significant advantage in yield, economy, land utilization ratio and reducing soil nitrate nitrogen (N) accumulation, as well as better residual effect on the subsequent wheat (Triticum aestivum L.) crop. Experiment 2 showed that intercropping systems reduced use of N fertilizer per unit land area and increased relative biomass of intercropped maize, due to promoted photosynthetic efficiency of border rows and N utilization during symbiotic period. Intercropping advantage began to emerge at tasseling stage after N topdressing for maize. Among all treatments with different row ratios, alternating four maize rows with six soybean rows (4M:6S) had the largest land equivalent ratio (1.30), total N accumulation in crops (258 kg ha-1), and economic benefit (3,408 USD ha-1). Compared to maize monoculture, 4M:6S had significantly lower nitrate-N accumulation in soil both after harvest of maize and after harvest of the subsequent wheat, but it did not decrease yield of wheat. The most important advantage of 4M:6S was to increase biomass of intercropped maize and soybean, which further led to the increase of total N accumulation by crops as well as economic benefit. In conclusion, alternating four maize rows with six soybean rows was the optimum row ratio in maize || soybean system, though this needs to be further confirmed by pluri-annual trials.

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Section: Methodsmentioning

confidence: 99%

Row Ratios of Intercropping Maize and Soybean Can Affect Agronomic Efficiency of the System and Subsequent Wheat

et al. 2015

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“…The photosynthetic ability of plants growing in cool climates is more sensitive to temperature (Fan et al . ). Thus, a plant's metabolism is severely reduced at low temperatures (Davies & Albrigo ).…”

Section: Discussionmentioning

confidence: 97%

“…Therefore, it is suggested that the temperature is an important factor that affects plant physiology (Allen & Ort 2001). The photosynthetic ability of plants growing in cool climates is more sensitive to temperature (Fan et al 2011). Thus, a plant's metabolism is severely reduced at low temperatures (Davies & Albrigo 1994).…”

Section: Discussionmentioning

confidence: 99%

Ecophysiological attributes of Mikania micrantha, an exotic invasive weed, at two different elevations in the tropical forest regions of the Western Ghats, South India

Prabu

Stalin

Swamy

2014

Weed Biology and Management

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Mikania micrantha H.B.K. is a fast‐growing, perennial vine and one of the world's worst alien invasive weeds. It is a major threat to agro‐ecosystems, plantation crops and agro‐forestry systems. An attempt was made to understand the physiological adaptation and ecological amplitude of M. micrantha at two different altitudes and seasons in the Western Ghats of south India. The relationships between the net photosynthetic rate (PN) and other physiological parameters, like stomatal conductance (gs), transpiration rate, intercellular CO2 concentration, vapor pressure deficit and water use efficiency, and environmental factors, like photosynthetically active radiation (PAR), leaf temperature and air temperature, were analyzed in order to understand their physiological adaptabilities. The PN exhibited a peak at 10.00 hours and declined gradually at both elevations; however, the populations at the lower elevation had a significantly greater PN than the populations at the higher elevation in November. The PN and gs were positively correlated with the PAR. Under significantly different PAR levels, the difference in the average PN was not significant for summer but was significant for winter between the two elevations. It suggested that the photosynthetic ability of M. micrantha is not affected by a difference in altitude (451 m and 912 m), as the differences in the environmental parameters were inconspicuous between the two elevations. These results indicated that this weed possesses great phenotypic plasticity and thrives better at lower elevations.

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“…The photosynthetic behaviour of alpine plants is often influenced by environmental conditions. There have been various studies on altitudinal trends for photosynthesis with increased (Fan et al, 2011; Wieser et al, 2010) or decreased (Qi et al, 2020) in different plants.…”

Section: Introductionmentioning

confidence: 99%

Functional trait correlation network and proteomic analysis reveal multifactorial adaptation mechanisms to a climatic gradient associated with high altitude in the Himalayan region

Kumari,

Kumar

2024

Plant Cell & Environment

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Globally occurring changes in environmental conditions necessitate extending our knowledge of the system‐level mechanisms underlying plant adaptation to multifactorial stress conditions or stress combinations. This is crucial for designing new strategies to maintain plant performance under simultaneous abiotic pressure. Here, we conducted our study at Rohtang Pass and sampled Picrorhiza kurroa leaves along high‐altitude gradient (3400, 3800 and 4100 meters above sea level) in the western Himalayas. The results showed the functional traits associated with morpho‐anatomical structures and eco‐physiological performances are highly variable. The air temperature and relative humidity represent dominant environmental factors among others that significantly regulate plant's physiological performance by adjusting the functional traits in altitude‐specific manner. A trait coordination network is developed among significantly altered plant functional traits, which reveals high‐altitude associated trait‐based adaptation. Moreover, it reveals leaf area shows the highest degree, while photochemical quenching reflects the weighted degree of centrality in the network. Proteomic analysis reveals various stress‐responsive proteins, including antioxidants were accumulated to deal with combined stress factors. Furthermore, a high‐altitudinal protein interaction network unravels key players of alpine plant adaptation processes. Altogether, these systems demonstrate a complex molecular interaction web extending the current knowledge of high‐altitudinal alpine plant adaptation, particularly in an endangered medicinal herb, P. kurroa.

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A comparative analysis of photosynthetic characteristics of hulless barley at two altitudes on the Tibetan Plateau

Cited by 8 publications

References 41 publications

Row Ratios of Intercropping Maize and Soybean Can Affect Agronomic Efficiency of the System and Subsequent Wheat

Row Ratios of Intercropping Maize and Soybean Can Affect Agronomic Efficiency of the System and Subsequent Wheat

Ecophysiological attributes of Mikania micrantha, an exotic invasive weed, at two different elevations in the tropical forest regions of the Western Ghats, South India

Functional trait correlation network and proteomic analysis reveal multifactorial adaptation mechanisms to a climatic gradient associated with high altitude in the Himalayan region

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