Salt Tolerance Seedlings Derived from Putative Hybrid Pines (<i>Pinus</i> × <i>densi</i>-<i>thunbergii</i>):

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  • Yonemichi Takashi
    The University of Tokyo Chiba Forest, the University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, the University of Tokyo
  • Tsukagoshi Takeshi
    The University of Tokyo Chiba Forest, the University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, the University of Tokyo
  • Karukome Tsutomu
    The University of Tokyo Chiba Forest, the University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, the University of Tokyo
  • Hisamoto Yoko
    The University of Tokyo Chiba Forest, the University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, the University of Tokyo
  • Ohmori Yoshihiro
    Agricultural Bioinfomatics Research Unit, Graduate School of Agricultural and Life Sciences, the University of Tokyo
  • Lian Chunlan
    Asian Natural Environmental Science Center, the University of Tokyo
  • P. Sato Mitsuhiko
    Field Science Center, Graduate School of Agricultural Science, Tohoku University
  • Sasaki Takanori
    Field Science Center, Graduate School of Agricultural Science, Tohoku University
  • Matsuo Ayumu
    Field Science Center, Graduate School of Agricultural Science, Tohoku University
  • Suyama Yoshihisa
    Field Science Center, Graduate School of Agricultural Science, Tohoku University
  • Goto Susumu
    Education and Research Center, The University of Tokyo Forests, Graduate School of Agricultural and Life Sciences, the University of Tokyo

Bibliographic Information

Other Title
  • クロマツ×アカマツ推定雑種から得られた実生苗の耐塩性
  • クロマツ×アカマツ推定雑種から得られた実生苗の耐塩性 : 海岸林再生に用いる材料としての利用可能性
  • クロマツ × アカマツ スイテイ ザッシュ カラ エラレタ ミショウ ナエ ノ タイエンセイ : カイガンリン サイセイ ニ モチイル ザイリョウ ト シテ ノ リヨウ カノウセイ
  • Possibility of Candidate Materials for Coastal Forest Restoration
  • ―海岸林再生に用いる材料としての利用可能性―

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Abstract

<p>Japanese black pine (Pinus thunbergii) is tolerant against salty wind but susceptible to pinewood nematodes, whereas Japanese red pine (Pinus densiflora) is more resistant against pinewood nematodes than P. thunbergii but weaker against salty wind. To produce materials with high resistance against pinewood nematodes and high tolerance against salty wind, we focused on seedlings derived from putative hybrid clones (Pinus × densi-thunbergii). In this study, we investigated the nuclear DNA genome composition of two putative hybrid clones. Using a PCR-RFLP method for analyzing chloroplast DNA, we subsequently identified the paternal species of progenies of two putative hybrids. Branches and potted seedlings from the progenies of P. densiflora, P. thunbergii, and the hybrids were immersed in seawater. We harvested the needles from them and measured the potential maximal PS Ⅱ quantum yield (Fv/Fm). We also dried some needle samples and used inductively coupled plasma mass spectrometry (ICP-MS) to determine Na concentrations. Nuclear DNA analysis of the putative hybrid clones revealed that they were F1 hybrids (P. × densi-thunbergii). Chloroplast DNA analysis revealed that progenies of the hybrid clones were sired by P. densiflora. Those progenies were significantly more salt tolerant than P. densiflora. Moreover, the Na concentration of needles of hybrid clones was lower than those of P. densiflora. Our results suggest that the progenies of hybrids are potential candidates for plantation in coastal pine forests, due to high resistance against pinewood-nematode and high tolerance against salt water.</p>

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