Shahanara Begum, Satoshi Nakaba, Yusuke Yamagishi, Yuichiro Oribe et al.
The timing of cambial reactivation plays an important role in determination of the amount and quality of wood and the environmental adaptivity of trees. Environmental factors, such as temperature, influence the growth and development of trees. Temperatures from late winter to early spring affect the...
Shahanara Begum, Kayo Kudo, Md Hasnat Rahman, Satoshi Nakaba et al.
KEY MESSAGE : A better understanding of the influence of environmental conditions on wood formation should help to improve the radial growth of trees and to prepare for climate change. The cambial activity of trees is associated with seasonal cycles of activity and dormancy in temperate zones. The t...
Shahanara Begum, Satoshi Nakaba, Yusuke Yamagishi, Kenichi Yamane et al.
BACKGROUND AND AIMS: Latewood formation in conifers occurs during the later part of the growing season, when the cell division activity of the cambium declines. Changes in temperature might be important for wood formation in trees. Therefore, the effects of a rapid decrease in temperature on cellula...
Kayo Kudo, Eri Nabeshima, Shahanara Begum, Yusuke Yamagishi et al.
BACKGROUND AND AIMS: The networks of vessel elements play a vital role in the transport of water from roots to leaves, and the continuous formation of earlywood vessels is crucial for the growth of ring-porous hardwoods. The differentiation of earlywood vessels is controlled by external and internal...
Widyanto Dwi Nugroho, Yusuke Yamagishi, Satoshi Nakaba, Shiori Fukuhara et al.
BACKGROUND AND AIMS: Angiosperm trees generally form tension wood on the upper sides of leaning stems. The formation of tension wood is an important response to gravitational stimulus. Gibberellin appears to be involved in the differentiation of secondary xylem, but it remains unclear whether gibber...
Shahanara Begum, Kayo Kudo, Yugo Matsuoka, Satoshi Nakaba et al.
BACKGROUND AND AIMS: In temperate regions, trees undergo annual cycles of cambial growth, with periods of cambial activity and dormancy. Environmental factors might regulate the cambial growth, as well as the development of cambial derivatives. We investigated the effects of low temperature by local...
Ryo Funada, Yusuke Yamagishi, Shahanara Begum, Kayo Kudo et al.
Md Hasnat Rahman, Shahanara Begum, Satoshi Nakaba, Yusuke Yamagishi et al.
KEY MESSAGE : We observed the formation of latewood tracheids with narrow diameters and thick walls and the disappearance of stored starch around the cambium on the locally heated region of stems in evergreen conifer Chamaecyparis pisifera during winter cambial dormancy. Wood formation is controlled...
Shahanara Begum, Masaki Shibagaki, Osamu Furusawa, Satoshi Nakaba et al.
The cold stability of microtubules during seasons of active and dormant cambium was analyzed in the conifers Abies firma, Abies sachalinensis and Larix leptolepis by immunofluorescence microscopy. Samples were fixed at room temperature and at a low temperature of 2-3°C to examine the effects of low ...
Md Hasnat Rahman, Widyanto Dwi Nugroho, Satoshi Nakaba, Peter Kitin et al.
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 cambia...
Satoshi Nakaba, Peter Kitin, Yusuke Yamagishi, Shahanara Begum et al.
Md Hasnat Rahman, Kayo Kudo, Yusuke Yamagishi, Yusuke Nakamura et al.
Temperature is an important factor for the cambial growth in temperate trees. We investigated the way daily temperatures patterns (maximum, average and minimum) from late winter to early spring affected the timing of cambial reactivation and xylem differentiation in stems of the conifer Chamaecypari...
Widyanto Dwi Nugroho, Satoshi Nakaba, Yusuke Yamagishi, Shahanara Begum et al.
BACKGROUND AND AIMS: Gibberellin stimulates negative gravitropism and the formation of tension wood in tilted Acacia mangium seedlings, while inhibitors of gibberellin synthesis strongly inhibit the return to vertical growth and suppress the formation of tension wood. To characterize the role of gib...
Md Hasnat Rahman, Shahanara Begum, Widyanto Dwi Nugroho, Satoshi Nakaba et al.
Abstract Water stress has a significant impact on tree growth. However, the effects of watering on cambial activity and its influence on tree growth in subtropical climates is poorly understood. The present study analyzed the cambial activity on the stem of evergreen hardwood Samanea saman in respon...
Shahanara Begum, Osamu Furusawa, Masaki Shibagaki, Satoshi Nakaba et al.
ABSTRACT The aim of the present study was to investigate the orientation and localization of actin filaments and cortical microtubules in wood-forming tissues in conifers to understand wood formation. Small blocks were collected from the main stems of Abies firma , Pinus densiflora , and Taxus cuspi...