An experimental assessment of carbon and nitrogen allocation in Pinus pinea populations under drought stress and rewatering treatment

Balekoğlu, Safa; Caliskan, Servet; Makineci, Ender; Dirik, Hüseyin

doi:10.1016/j.envexpbot.2023.105334

Cited by 3 publications

(3 citation statements)

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“…In our study, in untreated trees, P2 Despite rainfall and air temperature seasonal variations, interestingly, our study showed from winter to summer that fertilization contributed to a faster recovery from the stem shrinkage induced by water deficit than observed in control trees (gains of 4:29 in winter, 3:12 h in spring and 2:40 h in summer); in spring, the fertilization impact led to a recovery phase shorter than the previous shrinkage. These results are in agreement with Balekoglu et al (2023b) who found that in stone pine seedlings, a low C/N ratio in stems have superior resistance and recovery in summer. In the same season, in P. taiwanensis under high temperatures and low rainfall, the strong transpiration amplified the magnitude of contraction within tree stems; thus, the refill of the stem hydraulic capacitance was restricted due to the low soil water availability, resulting in the shrinkage of stems and lower growth and shorter duration of stem increments (Liu et al 2018).…”

Section: Discussionsupporting

confidence: 93%

“…This valuable finding agrees with results obtained by several authors that point out that a sufficient nutrient supply can increase the water-use efficiency during droughts and enable a faster recovery afterwards (Gessler et al 2017). In particular, Balekoglu et al (2023b) found that N availability increased stone pine recovery in summer; Chambi Legoas et al (2023) reported positive effects of K fertilization on Eucalyptus grandis for growth recovery following drought; and Wang et al (2022) concluded that fertilization can alleviate the negative effects of extreme drought on survival and recovery growth of Quercus pubescens saplings.…”

Section: Discussionsupporting

confidence: 92%

“…The occurrence of most irreversible growth during dry periods could be attributed to water reserves stored in the trees (Oberhuber 2017; Szymczak et al 2020) or to the ability of stone pine to tap water from deep soil layers (Brito et al 2017); if this ability is limited, severe drought may reduce growth and cause mortality. In fact, Schönbeck (2019) concluded that a low-intensity drought stress could be offset by increased nutrient availability, with fertilization improving the metabolism and functioning of the roots, and C allocation to belowground tissues, as also reported by Balekoglu et al (2023b).…”

Section: Discussionmentioning

confidence: 57%

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Effects of fertilization on radial growth of Pinus pinea explored hourly using dendrometers

Loewe-Muñoz,

del Río Millar,

Delard Rodriguez

et al. 2024

Ecol Process

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Background Stone pine (Pinus pinea), a drought-resistant species, has significant socio-economic benefits and increasing interest for the establishment of productive plantations in several countries, especially in a climate change context. Monitoring hourly stem diameter variations contributes to the understanding of the tree-growth response to changes in environmental conditions and management. By monitoring the diameter expansion of tree stems, high-resolution band dendrometers were used to study the development of adult trees growing in a semi-arid coastal environment of central Chile under fertilized and non-fertilized soil conditions through the span of a year. Results Short cycles (< 21 h) were few in fertilized and non-fertilized trees (6 and 4, respectively), whereas long cycles (> 28 h) occurred at a higher frequency in fertilized trees (16 vs 6). Most of the circadian cycles were regular (24 ± 3 h). The longest cycle duration (59 h) was observed in fertilized trees during spring. In all seasons, each phase of the circadian cycle, especially during the stem diameter increment phase (P3, irreversible growth), started earlier in fertilized than in control trees. P3 duration was significantly longer in fertilized than in control trees in springtime. The maximum shrinkage (P1) was observed in summer for both treatments. Stem diameter increased faster in fertilized than in control trees throughout the year, with the highest accumulation occurring in spring and the lowest in autumn. The daily variability pattern showed lower growth under high temperature across seasons. Conclusions This study highlights the importance of fertilization in enhancing stone pine diameter growth. This cultural practice should be further explored to contribute to the mitigation of climate change effects in semi-arid environments.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 57%

See 1 more Smart Citation

Effects of fertilization on radial growth of Pinus pinea explored hourly using dendrometers

Loewe-Muñoz,

del Río Millar,

Delard Rodriguez

et al. 2024

Ecol Process

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Using machine learning algorithms to cluster and classify stone pine (Pinus pinea L.) populations based on seed and seedling characteristics

Caliskan,

Kartal,

Balekoglu

et al. 2024

Eur J Forest Res

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The phenotype of a woody plant represents its unique morphological properties. Population discrimination and individual classification are crucial for breeding populations and conserving genetic diversity. Machine Learning (ML) algorithms are gaining traction as powerful tools for predicting phenotypes. The present study is focused on classifying and clustering the seeds and seedlings in terms of morphological characteristics using ML algorithms. In addition, the k-means algorithm is used to determine the ideal number of clusters. The results obtained from the k-means algorithm were then compared with reality. The best classification performance achieved by the Random Forest algorithm was an accuracy of 0.648 and an F1-Score of 0.658 for the seed traits. Also, the best classification performance for stone pine seedlings was observed for the k-Nearest Neighbors algorithm (k = 18), for which the accuracy and F1-Score were 0.571 and 0.582, respectively. The best clustering performance was achieved with k = 2 for the seed (average Silhouette index = 0.48) and seedling (average Silhouette Index = 0.51) traits. According to the principal component analysis, two dimensions accounted for 97% and 63% of the traits of seeds and seedlings, respectively. The most important features between the seed and seedling traits were cone weight and bud set, respectively. This study will provide a foundation and motivation for future efforts in forest management practices, particularly regarding reforestation, yield optimization, and breeding programs.

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Yüksek hassasiyetli dendrometreler kullanılarak Cedrus libani, Juniperus excelsa ve Pinus brutia’da radyal büyüme ve ağaç su açığının değerlendirilmesi

Güney,

Cankara,

Bahar

2024

Turkish Journal of Forestry | Türkiye Ormancılık Dergisi

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Yüksek hassasiyetli dendrometrelerin sürekli ölçümlerinden elde edilen veriler, radyal gövde büyümesi ve ağaç su ilişkileri hakkında yüksek çözünürlükte bilgi sunar. 2022 yılında, "DenTRo" girişiminin bir parçası olarak Antalya'da iki uzun vadeli izleme sahası kurulmuştur: Elmalı Sedir Araştırma Ormanı'ndaki bir Cedrus libani A. Rich (Toros sediri)- Juniperus excelsa (Boylu ardıç) karışık meşceresi ve Bük Lütfü Büyükyıldırım Araştırma Ormanı'ndaki saf bir Pinus brutia (kızılçam) meşceresinde saatlik gövde yarıçap değişimlerini ölçmek için nokta dendrometreler kullanılmıştır. Bu çalışma, 2022 büyüme sezonunu kapsayan gövde yarıçap değişimi ölçümlerinin ilk sonuçlarını sunmaktadır. Radyal büyümenin yıl içerisindeki seyri Gompertz büyüme fonksiyonu ile modellenmiştir. Ayrıca, radyal gövde büyümesi (GRO) ve gövde çapının daralmasına sebep olan ağaç su açığı (TWD) saatlik gövde yarıçap değişimi ölçümlerinden hesaplanmıştır. GRO ve TWD’nin yıl içerisindeki seyri türler arasında karşılaştırılmıştır ve korelasyon analizi ile meteorolojik değişkenlerle ilişkilendirilmiştir. Kızılçamda radyal gövde büyümesi, sedir ve boylu ardıça göre yaklaşık üç hafta önce, Nisan ayının ilk haftasında başlamıştır. Kızılçam ayrıca maksimum GRO değerlerine de daha erken ulaşmıştır. Her üç türde de ana gövde büyümesi temmuz ayından önce gerçekleşmiş, ardından artan TWD ile ölçüldüğü üzere hepsi uzun süreli su kısıtlamaları yaşamıştır. Bağıl nem sedir ve boylu ardıçta GRO üzerinde daha güçlü bir pozitif etkiye sahipken, kızılçamda GRO ve TWD sırasıyla yağış ve yüksek sıcaklıklarla güçlü pozitif korelasyon göstermiştir. Ağaçların iklim değişikliğinden nasıl etkilendiği hakkında daha ayrıntılı ve kapsamlı bilgiler edinilmesine olanak sağlayabilmek için, farklı orman ekosistemlerinde dendrometre gibi ekofizyolojik yöntemler kullanan uzun süreli izleme sahalarının kurulmasına ihtiyaç vardır.

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An experimental assessment of carbon and nitrogen allocation in Pinus pinea populations under drought stress and rewatering treatment

Cited by 3 publications

References 89 publications

Effects of fertilization on radial growth of Pinus pinea explored hourly using dendrometers

Effects of fertilization on radial growth of Pinus pinea explored hourly using dendrometers

Using machine learning algorithms to cluster and classify stone pine (Pinus pinea L.) populations based on seed and seedling characteristics

Yüksek hassasiyetli dendrometreler kullanılarak Cedrus libani, Juniperus excelsa ve Pinus brutia’da radyal büyüme ve ağaç su açığının değerlendirilmesi

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