Nitrogen allocation regulates the relationship between maximum carboxylation rate and chlorophyll content along the vertical gradient of subtropical forest canopy

Zhuang, Jie; Zhou, Lei; Wang, Yonglin; Chi, Yonggang

doi:10.1016/j.agrformet.2021.108512

Cited by 17 publications

(14 citation statements)

References 43 publications

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“…In support of this idea, in L. chinensis , PNUE was positively correlated with N area , N PSN , and Chl area . V cmax is a proxy for the enzymatic activity of Rubisco during the photosynthetic carbon-fixation reactions ( Farquhar et al, 1980 ; Sharkey, 2016 ; Zhuang et al, 2021 ). The inorganic N sources significantly increased the V cmax and J max of L. chinensis .…”

Section: Discussionmentioning

confidence: 99%

“…The inorganic N sources significantly increased the V cmax and J max of L. chinensis . Variations in V cmax can be explained by changes in LMA, N area , or the proportion of N allocated to the carboxylation system ( Yin et al, 2019 ; Zhuang et al, 2021 ). These findings indicated that the NO3- supply is closely related to the normal growth of L. chinensis leaves.…”

Section: Discussionmentioning

confidence: 99%

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Improved Utilization of Nitrate Nitrogen Through Within-Leaf Nitrogen Allocation Trade-Offs in Leymus chinensis

et al. 2022

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The Sharply increasing atmospheric nitrogen (N) deposition may substantially impact the N availability and photosynthetic capacity of terrestrial plants. Determining the trade-off relationship between within-leaf N sources and allocation is therefore critical for understanding the photosynthetic response to nitrogen deposition in grassland ecosystems. We conducted field experiments to examine the effects of inorganic nitrogen addition (sole NH4+, sole NO3– and mixed NH4+/NO3–: 50%/50%) on N assimilation and allocation by Leymus chinensis. The leaf N allocated to the photosynthetic apparatus (NPSN) and chlorophyll content per unit area (Chlarea) were significantly positively correlated with the photosynthetic N-use efficiency (PNUE). The sole NO3– treatment significantly increased the plant leaf PNUE and biomass by increasing the photosynthetic N allocation and Chlarea. Under the NO3 treatment, L. chinensis plants devoted more N to their bioenergetics and light-harvesting systems to increase electron transfer. Plants reduced the cell wall N allocation or increased their soluble protein concentrations to balance growth and defense under the NO3 treatment. In the sole NH4+ treatment, however, plants decreased their N allocation to photosynthetic components, but increased their N allocation to the cell wall and elsewhere. Our findings demonstrated that within-leaf N allocation optimization is a key adaptive mechanism by which plants maximize their PNUE and biomass under predicted future global changes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Improved Utilization of Nitrate Nitrogen Through Within-Leaf Nitrogen Allocation Trade-Offs in Leymus chinensis

et al. 2022

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“…Sun leaves tend to have a higher leaf mass per area (LMA), nitrogen, chlorophyll and carotenoid content on an area basis, as well as a higher ratio of chlorophyll a / b , compared with shade leaves (Lichtenthaler et al ., 2007; Lichtenthaler et al ., 2013). This means that sun leaves can usually reach higher rates of electron transfer and carboxylation than shade leaves, at the expense of higher respiration rates and a higher photosynthetic light compensation point (Scartazza et al ., 2016; Liu et al ., 2019; Zhuang et al ., 2021). When accounting for the decline in irradiance through the canopy, these differences in leaf traits result in a corresponding vertical gradient of leaf nitrogen, photosynthetic rate and capacity (Campany et al ., 2016; Hikosaka, 2016; Liu et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Sunflecks in the upper canopy: dynamics of light‐use efficiency in sun and shade leaves of Fagus sylvatica

et al. 2022

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Sunflecks are transient patches of direct radiation that provide a substantial proportion of the daily irradiance to leaves in the lower canopy. In this position, faster photosynthetic induction would allow for higher sunfleck-use efficiency, as is commonly reported in the literature. Yet, when sunflecks are too few and far between, it may be more beneficial for shade leaves to prioritize efficient photosynthesis under shade.We investigated the temporal dynamics of photosynthetic induction, recovery under shade, and stomatal movement during a sunfleck, in sun and shade leaves of Fagus sylvatica from three provenances of contrasting origin.We found that shade leaves complete full induction in a shorter time than sun leaves, but that sun leaves respond faster than shade leaves due to their much larger amplitude of induction. The core-range provenance achieved faster stomatal opening in shade leaves, which may allow for better sunfleck-use efficiency in denser canopies and lower canopy positions.Our findings represent a paradigm shift for future research into light fluctuations in canopies, drawing attention to the ubiquitous importance of sunflecks for photosynthesis, not only in lower-canopy leaves where shade is prevalent, but particularly in the upper canopy where longer sunflecks are more common due to canopy openness.

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“…Büyük biyomas, küçük spesifik yaprak alanı yaprakların güçlü fotosentez yeteneğini göstermektedir [2]. ''Yaprak ekonomisi spektrumu'' olarak adlandırılan bu değerler [12,13] bitki boyu, tohum ağırlığı, azot içeriği, gövde yoğunluğu gibi diğer önemli bitki özellikleri ile nicelik olarak güçlü bir şekilde ilişkilidir [14][15][16]. Bu durum onları ekosistem fonksiyonlarını, komuniteler içi etkileşimleri, türlerin iklim değişikliğine cevaplarını belirlemede anahtar bir özellik yapmaktadır [17].…”

Section: Introductionunclassified

“…Bu durum onları ekosistem fonksiyonlarını, komuniteler içi etkileşimleri, türlerin iklim değişikliğine cevaplarını belirlemede anahtar bir özellik yapmaktadır [17]. Bu nedenle global ölçekte farklı ekosistemlerde bulunan bitkilerin verdikleri farklı cevaplar ile SLA ve LMA özelliklerinin ilişkisini ortaya koyan çalışmaların devam ettiği görülmektedir [5,11,14,[18][19][20].…”

Section: Introductionunclassified

Laurocerasus officinalis M. Roem Taksonunda Yükseklik ve Yağış Gradiyenti Boyunca Bazı Yaprak Özelliklerinin İncelenmesi

Özbucak

Keskin

2022

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmada Ordu ili ve doğusunda yükseklik (0 m, 450 m, 750 m) ve yağış gradiyentine (Ordu, Trabzon, Rize) bağlı olarak belirlenen örnek parsellerden iki yıllık periyotta genç, olgun ve senesens dönemde toplanan Laurocerasus officinalis M. Roem taksonuna ait yaprak örneklerinde spesifik yaprak alanı (SLA) ve ağırlığı (LMA) değerleri incelenmiştir. Yükseklik gradientine bağlı olarak SLA ve LMA için yapılan üç-yönlü varyans analizi sonucunda yıl-dönem ikili interaksiyonu ve bölge faktörü istatistiksel olarak önemli bulunmuştur. SLA için yapılan Tukey testine göre, 0 m ve 750 m lokaliteleri arasındaki farkın istatistiki olarak önemli olduğu belirlenmiştir. 2019 yılında genç ve olgun dönemlerde, 2020’de ise her üç dönem arasında istatistiki olarak önemli farklılıklar bulunmuştur. LMA’nın Tukey testine göre, 0 m lokalitesinin istatistiki olarak önemli olduğu belirlenmiştir. 2019 yılında genç dönemin, 2020’de ise her üç dönem arasındaki farkın istatistiki olarak önemli olduğu bulunmuştur. Yağış gradientine bağlı olarak SLA ve LMA için yapılan üç-yönlü varyans analizi sonucuna göre yıl-dönem ikili interaksiyonu istatistiksel olarak önemli bulunmuştur. Bununla beraber, SLA ve LMA’nın Tukey testi sonuçlarına göre, 2019 yılında genç dönemin, 2020’de ise her üç dönem arasındaki farkın istatistiki olarak önemli olduğu tespit edilmiştir.

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Nitrogen allocation regulates the relationship between maximum carboxylation rate and chlorophyll content along the vertical gradient of subtropical forest canopy

Cited by 17 publications

References 43 publications

Improved Utilization of Nitrate Nitrogen Through Within-Leaf Nitrogen Allocation Trade-Offs in Leymus chinensis

Improved Utilization of Nitrate Nitrogen Through Within-Leaf Nitrogen Allocation Trade-Offs in Leymus chinensis

Sunflecks in the upper canopy: dynamics of light‐use efficiency in sun and shade leaves of Fagus sylvatica

Laurocerasus officinalis M. Roem Taksonunda Yükseklik ve Yağış Gradiyenti Boyunca Bazı Yaprak Özelliklerinin İncelenmesi

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