Host preference and seed dispersal of hemiprasite Buckleya lanceolate

2018 Fiscal Year Final Research Report

• Project/Area Number: 15K07477
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Gifu University
• Principal Investigator: Kato Shogo 岐阜大学, 応用生物科学部, 准教授 (20324288)
• Research Collaborator: HANAOKA So
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: 半寄生植物 / 風散布 / 根 / 果実 / 寄生根 / ホスト / 分布

Outline of Final Research Achievements

We evaluated host preference in Buckleya lanceolate quantitatively while comparing the root abundance of host species to the number of parasite root (haustorium) in Chamaecyparis obtusa - Castanopsis cuspidate forest. We dug soil the around root of four B. lanceolate and got 798 parasite root. The host of parasite root were identified by DNA barcoding and extraction liquid of root grinded. Three individuals had much number of parasite root of fine root in C. obtusa and one individual had much in C. cuspidate. B. lanceolate often formed a small parasite root to fine root and was not almost observed the state that parasite root adhered to an extremely large host root. We conclude that B. lanceolate preferred slightly fine root of C. obtuse. Productivity of fine root in host trees is likely significant factor in selection by B. lanceolate.

Free Research Field

森林生態学

Academic Significance and Societal Importance of the Research Achievements

根で寄生する半寄生植物であるツクバネは、他の樹木に比べて分布が限定的である。このような特殊な生態を持つ樹木の保全や利用を考えた場合に、寄生樹種の選好性を明らかにしたことは、ツクバネの生育地の保全や、その利用を検討するための基礎情報となる。
また、果実の散布距離が、一定の範囲に止まるものが多いことが明らかになったことから、ツクバネの生育地保全には狭い範囲の生育地保全を行った上で、他の場所に好適環境を作り出す必要があることがわかった。