Sains Malaysiana 43(12)(2014): 1821–1826

The Importance of Population Origin and Reciprocal Heterogeneous Microhabitat on Clonal Propagation of Iris japonica Thunb.

(Kepentingan Populasi Asal dan Mikrohabitat Heterogen Resiprokal ke atas Propagasi Klon

Iris japonica Thunb.)

XUE-FENG MENG¹, QING-YU LI², ZHEN LI¹, XIAO-JING WU¹ & YONG-JIAN WANG¹*

¹College of Horticulture & Forestry Sciences, Huazhong Agricultural University

Wuhan 430070, R.P. China

²College of Urban Planning and Environmental Science, Xuchang University

Xuchang, 461000, R.P. China

Received: 19 December 2013/Accepted: 16 April 2014

ABSTRACT

A reciprocal transplant-replant experiment was carried out to investigate the clonal plasticity and local specialization of OAFE population (O type) and BF population (U type) of a clonal rhizome herb Iris japonica in contrasting reciprocal heterogeneous habitats on Jinyun Mountain. U Population had better performance of plant size and clonal propagation (including allocation to clonal propagation, daughter ramet and fine rhizome) in different reciprocal heterogeneous habitats than O population. Both the population origin and reciprocal spatial heterogeneous habitat had effects on clonal ramets and biomass of clonal components of experimental plants. The plasticity of clonal growth had difference in clonal components to balance High light-Low soil resources (water) (HL) or Low light-High soil resources (LH) due to the ecological isolation of the two I. japonica populations. Our findings indicated that two major types of patterns of spatial covariance of resources can have different effects on the growth and local variation of clonal plants.

Keywords: Clonal plant; clonal propagation; geneotype (G) × environment (E) interaction; plasticity; reciprocal heterogeneous habitat

ABSTRAK

Suatu eksperimen resiprokal pemindahan-tanam semula telah dijalankan untuk mengkaji keplastikan klon dan pengkhususan setempat populasi OAFE (jenis O) dan populasi BF (jenis U) daripada rhizom herba klon Iris japonica dalam pembezaan habitat heterogen resiprokal di Gunung Jinyun. Populasi U mempunyai prestasi yang lebih baik daripada populasi O daripada segi saiz tumbuhan dan propagasi klon (termasuk peruntukan untuk propagasi klon, anak ramet dan rhizom halus) dalam habitat heterogen resiprokal yang berlainan. Kedua-dua populasi asal dan reruang habitat heterogen mempunyai kesan ke atas ramet klon dan biomas komponen klon dalam tumbuhan yang dikaji. Keplastikan pertumbuhan klon menunjukkan perbezaan dalam komponen klon untuk mengimbangi sumber cahaya tinggi-tanah rendah (air) (HL) atau sumber tanah tinggi-cahaya rendah (LH) yang disebabkan oleh pengasingan ekologi kedua-dua populasiI. japonica tersebut. Hasil kajian kami menunjukkan bahawa dua corak utama kovarians reruang sumber boleh memberikan kesan yang berbeza pada pertumbuhan dan variasi tempatan bagi tumbuhan klon.

Kata kunci: Habitat heterogen resiprokal; interaksi geneotip (G) × persekitaran (E); keplastikan; propagasi klon; tumbuhan klon

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*Corresponding author; email: wangyj@mail.hzau.edu.cn