Differences in drought- and freeze-induced embolisms in deciduous ring-porous plant species in Japan

Umebayashi, Toshihiro; Utsumi, Yasuhiro; Koga, Shinya; Murata, Ikue; Fukuda, Kenji

doi:10.1007/s00425-016-2564-9

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…Sea-buckthorn is a ring-porous tree species, so current-year early wood vessels play a major role in hydraulic conductivity ( Umebayashi et al 2016 ). Although there was no significant difference in vessel diameter, the vessel density of the two types of 15-year-old tree decreased significantly to about 200 No mm −2 compared to 294 No mm −2 in 4y trees, and the early wood width decreased to 176 and 134 μm for 15yN and 15yH trees compared to 261 μm in 4y trees, respectively.…”

Section: Discussionmentioning

confidence: 99%

Interactive effect between tree ageing and trunk-boring pest reduces hydraulics and carbon metabolism inHippophae rhamnoides

Wang

et al. 2022

AoB PLANTS

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Sea-buckthorn (Hippophae rhamnoides) is widely distributed across the Eurasian continent. Recently sea-buckthorn has shown premature aging and decline when confronted with water deficiency and Holcocerus hippophaecolus damage in northwest China and the Loess Plateau region. However, the physiological process of sea-buckthorn senescence in response to drought and pest damage is still unknown. In this study, 4-year-old (4y), 15-year-old normal growth (15yN) and 15-year-old seriously moth-damaged sea-buckthorn plants (15yH) were used as the research objects. The growth of branches and roots, branch water potential and percentage loss of hydraulic conductivity (PLC), branch vulnerability to embolism (quantified by P50, xylem water potential at 50% of PLC), branch xylem parenchyma cell viability, photosynthesis, and the nonstructural carbohydrate (NSC) content in branches and roots in dry and wet seasons were measured. The results showed that the length, basal diameter of 1-year-old branches and the leaf area of 4y trees were significantly larger than that of 15yN and 15yH trees, and the fine root density of 15yH trees was significantly lower than that of 15yN trees in all measured areas. The branch specific hydraulic conductivity of 15yN and 15yH trees was only 50.2% and 12.3% of that of 4y trees, and the P50 of 4y, 15yH and 15yN trees was -3.69 MPa, -2.71 MPa and -1.15 MPa, respectively. The midday water potential and photosynthetic rate were highest in 4y trees, followed by 15yN and then 15yH trees in both the dry season and wet seasons, while branch PLC declined in the opposite direction (15yH trees highest, 4y trees lowest). The degree of PLC repair within a day was highest in 4y trees, followed by 15yN and then 15yH trees, and the viability of xylem cells was consistent with this pattern. The branch xylem starch and NSC content of 4y and 15yN trees was significantly higher than that of 15yH trees in the dry season, and the root starch and NSC content of 4y trees was significantly higher than that of 15yH trees in the two seasons. The above results suggest that the hydraulic properties of the normal elderly and seriously pest-damaged sea-buckthorn were significantly worse than in juvenile plants. Narrower early wood width and vessel density, high embolism vulnerability and weak embolism repair capacity led to the decline in water-conducting ability, and similarly further affected photosynthesis and the root NSC content. The decline in xylem parenchyma cell viability was the main reason for the limited embolism repair in the branches.

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Section: Discussionmentioning

confidence: 99%

Interactive effect between tree ageing and trunk-boring pest reduces hydraulics and carbon metabolism inHippophae rhamnoides

Wang

et al. 2022

AoB PLANTS

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“…Differing responses of diffuse‐porous and ring‐porous species to dry‐season precipitation could be expected because of differences in the hydraulic architecture, water transport physiology, and climate adaptation strategies (see discussions by Kitin and Funada, ; Kudo et al., , ; Umebayashi et al., , ). Temperate species with diffuse‐porous wood typically use several growth increments for water transport and are able to resume sap transport faster than species with ring‐porous structure.…”

Section: Discussionmentioning

confidence: 99%

Changes in cambial activity are related to precipitation patterns in four tropical hardwood species grown in Indonesia

Rahman

Nugroho

Nakaba

et al. 2019

American J of Botany

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Premise Cambial activity in some tropical trees varies intra‐annually, with the formation of xylem rings. Identification of the climatic factors that regulate cambial activity is important for understanding the growth of such species. We analyzed the relationship between climatic factors and cambial activity in four tropical hardwoods, Acacia mangium, Tectona grandis, Eucalyptus urophylla, and Neolamarckia cadamba in Yogyakarta, Java Island, Indonesia, which has a rainy season (November–June) and a dry season (July–October). Methods Small blocks containing phloem, cambium, and xylem were collected from main stems in January 2014, October 2015 and October 2016, and examined with light microscopy for cambial cell division, fusiform cambial cells, and expanding xylem cells as evidence of cambial activity. Results During the rainy season, when precipitation was high, cambium was active. By contrast, during the dry season in 2015, when there was no precipitation, cambium was dormant. However, in October 2016, during the so‐called dry season, cambium was active, cell division was conspicuous, and a new xylem ring formation was initiated. The difference in cambial activity appeared to be related to an unusual pattern of precipitation during the typically dry months, from July to October, in 2016. Conclusions Our results indicate that low or absent precipitation for 3 to 4 months induces cessation of cambial activity and temporal periodicity of wood formation in the four species studied. By contrast, in the event of continuing precipitation, cambial activity in the same trees may continue throughout the year. The frequency pattern of precipitation appears to be an important determinant of wood formation in tropical trees.

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“…There are additional methods for plant visualization, such as micro-CT, cryo-sem (Choat et al , 2015; Umebayashi et al , 2016), or positron emission tomography (PET) (Converse et al , 2015). However, MRI has several important advantages, the main one being that, compared to other imaging methods, MRI is a true multi-parametric method where the image contrast can provide information on a range of tissue characteristics, from proton density and relaxation, through to susceptibility, diffusion, and flow.…”

Section: Discussionmentioning

confidence: 99%

Studying microstructure and microstructural changes in plant tissues by advanced diffusion magnetic resonance imaging techniques

Morozov

Tal

Pisanty

et al. 2017

Journal of Experimental Botany

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Differences in drought- and freeze-induced embolisms in deciduous ring-porous plant species in Japan

Cited by 7 publications

References 32 publications

Interactive effect between tree ageing and trunk-boring pest reduces hydraulics and carbon metabolism inHippophae rhamnoides

Interactive effect between tree ageing and trunk-boring pest reduces hydraulics and carbon metabolism inHippophae rhamnoides

Changes in cambial activity are related to precipitation patterns in four tropical hardwood species grown in Indonesia

Studying microstructure and microstructural changes in plant tissues by advanced diffusion magnetic resonance imaging techniques

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