+'+F9ßªą/+œĞÇÓÇÓƧĵµĴÂŉÓŃŏŉ Ų¼ļ,6âÈİ¬Ƽ Ƽ Ƽ
Between animal and plant?; Hatena arenicola is harf-plant and harf-predator
Key words: cell division; chloroplast; Hatena arenicola; Nephroselmis; secondary
endosymbiosis.
Haruyo Yamaguchi
Graduate School of Life and Environmental Sciences, University of Tsukuba
Tsukuba, Ibaraki 305-8572, Japan@?

 2005äƻe]a/ÊÎ1¥ŗŬĵĬ4ĹžMnpQ4ŉÓƬƂ
Science2À³G( (Okamoto & Inouye 2005)5đe]aĹžG(/1ÿŪBƬƂ.¨ExDGƻ,25Íð¸Ơ.AŘG(1&ƻe]aG<0RsvYM\iG(4)Hǀ 'G5ƻe]a=2ĬDďĬ21H/!-FĵĬ)/©Ė@DG(D.FďĬ5ùƵï4ĽčĵĬŗŬ2ŵƴJ¨EƏ?/.Ƅĵ!(/ŗŬĵƆ5ı¹.5å©GDG-Fƻ'4Ɩ¢04C2ƖK)4ƻØ5CI+-1

ň(*5Çă2[NmXp\i!-ƻƘ§2ƌ+(ŗŬĵ4wƛÏřJŃŏ#F/5.1 .5ƻ0!(D)Hǀ
=2ďĬ21H/!-Fƻe]a 4C1ĵĬJŃŏ#G64.Fe]a 5ƻĵġĴ41.ƻ

ĵFŗŬ/ƻ®õJŷŗŬ4{ĀJĵ>#Ąć2C+-ƻĬ.EƻďĬ14.F1/«ŭ14)HA?¸ 1 e]a4ÓƳëƟĽ NƿčƻĿư,=Eƻe]a5 ƿ ľ Ĩ ƻ bar= 10 µm(Okamoto & Inouye
0!-4C2006)         Ĭ4C2ùƵ!-Ge]ağĻGFĳķ.F1& #/"$ e]a 4ėç°Ŋ5Hatena arenicolaƹe]auMrbToƺ/ƁƻÞ°4Hatena 5āĈƅ4zîƊ1/ƁųJo]tƅ¢!(A4.ƻōÝ°4arenicola 5o]tƅ.łĢ2
?/ó´.FFōÝ°4ƔEƻe]a5łĢ4łŕ4)4ĝ4|2ĵñ!-łŕ/ƪÙĬJƚ-ĵġ#F42Ɯ®4ƻŗŬ5Ʈã2;+(K.ƻ

ŗŬ4ơé530-40 µmƻŁé515-20 µm.2Ĉ4ƯĜJø, (¸1)

H. Yamaguchi - 1

G5¥ŗŬ4¦ĵĵĬ4|.5ŗŬVNY4Çƛƴ2²=GF =(ƻe]a5
ƗĠJ%$ƻº:(JƓ,6FC2 e]a4wĸ4ĭì5'4ŗŬ21-44ĵŵ (¸1) Jø,wĀ.ƻĵŵJø(1ŗŬ (¸24á)AÒ¹#F/.F ĵŵJø+-F/25ƻĵŵ4þ2ID$ŗŬő214ľĨJø+-F

ľĨ/5ŗŬ4Ā

±JƃƉ#F4JFŗŬĐƕ4/.F =(ƻŰ´Ħ/2ƻĵŵJø(1ŗŬ5ƻ,32ĵŵJø,ŗ ¸ 2 ŗŬŹĄ4ÓƳëƟĽ NƿčƻS=ĵŬCEAÝ

B? /9 4627 e]a5Ŗŝĺ25Q[hrgLpXďĬƢƹ=(5ƻQ[hrgLpXƢƺ2Þ#ƻĿưƿľĨƻbar= 10 µm(Okamoto & Inouye 2006)         Q[hrgLpXƴ5ĥĝ½Bģ½2-ƻ9,2žDGFùƵï4¦ĵĵĬ.F ĈƢ2-ƻųŢJø*®õJ#F/îIGFō5e]aÅŀDG-1¸ 3 e]a4Ŗŝĺŧ (Kim & Graham
2008 4ŖŝēJ¿2¸         

 =(ƻQ[hrgLpXďĬƢ2wĸƐŤ1ƴŨ5ƻRpi_ďĬƢBei_ďĬƢ.
F/ÑŖŝƀċ4ŜČD~òG-5
FA44ƻƀċ#FƙÑ2C+-GD4ƤüøG1Á®AEƻØ5CID1
(¸3)
 wĀƻe]a¨EƏK)ĵŵ5ŢűďĬƢc
gsZqlXŵŠ2Þ#FNephroselmis Þŵƴƹ ¸ 4 e]a4ĵ)/îIGFcgsZyƻcgsZqlXƺ (¸4) .F/I+ qlX4Ƽō bar= 10 µm       -Fƻ'4|404ōe]a4ĵŵ21+(45zĂ.F cgsZqlX52Ĉ4ƯĜ.ƗĠ!ƻŗŬ251,4ųŢ/14ľĨJø,Ý1ƴŨ)ƻģĝ½2-Ʊť2ı#FC?

58!5(= 9,ƻŗŬ2¨EƏ=G(ŵƴ5OV/!-ƃƉGƻ#2Ĥ¢G-!=ƻe]a5¨EƏK)ŵƴJwĄĺ1ųŢ/!-ø#F/«ŭ.F¨EƏ=G(ĵŵ5e]a4ŗŬ.04C21+-F4)Hǀ ¸55e]aĵŵJø!-F/4ŗŬ4ëŗĐƕJĒçĺ2Ÿ!(A4.Fe]a2¨EƏ=G(cgsZqlXA/A/ø+-(čƻl_Tt`pMƻUqW
5ĘÒ!-FƮã2ƒ¢ĺ.ƻƯĜƻŗŬƸĎƻÝŬ2ů+-5Õ2ÉIG-F
wĀ.ƻųŢ5ūÇ¢!ƻfrdN`4þ5Ůķĵġï4cgsZqlX1!ø(1H. Yamaguchi - 242Ü!ƻe]aĵŵ.5żþſÛGF =(ƻ¨EƏ=G(ĵŵ4ųŢ25ľĨFƻÅ1e]a4ŗŬőJ±-ƝŧG-F  x4/Dƻe]a2/+-5ĵŵ4ųŢƮã2ƞŽ.F/ũDGF '4ųŢJşø#F42
zíŽ1A450K0KÉIGFĀ±2F/îIGƻ4/54ĕďĬ.AžDGFƹRsooRbPtďĬ
/Rpi_ďĬ.5ĵŵ4ųŢÅ2čƒ¢ĺ)ĘÒ!-Fƺ=(ƻ¸ ĵJA+-F/4e]a4ŗŬĒç¸        

ľĨ54Ā±ïJƃƉ#F42ƞŽ.
FƻĵŵųŢ4ľĨJ,.A¯"ŧ2Ɲŧ#F10ƻe]aĵŵJŮ4
wƛ.F4C2Ìƫ¢!-FđFD?



58:/*.  ¥ŗŬĵĬ2-ƻĆïĵę4Ò¹
ŀDG-F5=G.ƻÆ5ĩïĺ1ƽŹ2CFÃę4>ŀDGFe]a2-AƻĆïĵę4Ò¹5ŀDG-D$ƻ
A+7Dĩïĺ2Ãę#F/ũDGF ďĬŗŬ4ŗŬŹĄ25ƻ9,ÐŗŬ2żŻG(ųŢ»Œ2ƝGF!

!ƻe]a.5ã2wĀ4ÐŗŬ24>
ĵŵ©ŞGF (¸2, 6) ĵŵ©ŞG1+(ĩű4ŗŬ.5ƻĵŵJø+-FŗŬ2-ľĨƝŧG-(Á¸ 6 e]a4ŗŬŹ4ƘŌ NƿčƻS=ĵ÷2ùƵźŧÿ(2ı#F (¸7) ùƵź ƻĿưƿľĨ bar= 10 µm (Okamoto & Inouye
ŧJø+(ĩű4e]a5ƻÿ(2ĵŵ.

2006)

     FcgsZqlXJú!!ƻ¨EƏ>ƻ
ø#F/2C+-ƻ9((8ĵŵJø+(e]a2öF/ũDGF,=Eƻe]a5wæŹ#F/2ùƵï4ŗŬ/®õï4ŗŬ4ĵĶJŷ+-F4.F x4ŜČDû×GFe]a4ĵġĴ
J¸82ņ# 4C2e]a5ŗŬŹê ¸ 7 ĵŵJø,ŗŬ.4ľĨ4ŧ/ĩű
4ŗŬ2FùƵźŧ4ŧ

H. Yamaguchi - 32¤5ŵƴ/!-ƻĘE4¤5ùƵï4ƯĜŶ/!-į4C2ĵ-F

4¤ŵ¤į/AƁ:ĵġĴ5ƻùƵïĽčĵĬďĬ¢#FƘŌ.ƔƘ#FX]\i41,)/ũDGF

4ĮôDƻe]a/ųŢ4¯ƈŹƌG6ƻe]a5ąG-Õ2ďĬ21+(/ƁCĽčĵĬƄĵ!(ĄĨ.A/A/ďĬ)+(ĵĬ5Ò¹%$ƻ Ĭĺ1ùƵïĽčŗŬŵƴJŗŬĵ%FNjt_Jś-ƻďĬ¢!(
4.F¸ƾ û×GFe]a4ĵġĴ ƹØţ5ſÛDĂD2G(X]\i.ƻńţ5~òGFX]\iJņ#ƻOkamoto & Inouye 2006 4¦¸JA/2ýÄƺ

E?A)/'+ >3 4C2e]a5ƻŗŬĵ2C

FďĬ4õŐJũFx.Ʈã2Ű´ĦıƋJž%-GF

Ľčŵƴ4ŗŬ

ĵ2C+-ÿ(1ďĬĵ=GFƖ¢Jĕĵ/e]a5Ľčŵƴ

J¨EƏK.ďĬ21H/#Fĕ
ĵ4|ƣĚƨ4ĵĬ.FØ5e]a/¯đ2ƻı¹Ɩŷè.ďĬ21H/!-F,4¦ĵĵĬŀDGEƻĕĵ4==12,-4ŀžŴŎG-F'GDJš®#F/ƻ2ĕĵ2CFďĬ¢4ƘŌ5¸94C.+(/ûħGF (x¸ û×GF  ĕĵ2CFďĬ¢4ƘŌ2007)

H. Yamaguchi - 4 X]vW15ƻ¨EƏK)ŵƴJOV/!-Ĥ¢%$ƻŁćƣ)ŗŬ2şø#FĚƨ.
F4Ěƨ.ƻĭ×4ŵƴ)5Ĥ¢!1ƙĺ!>ŅŐGF/îIGF!

!ƻĵƤz£.F(@ƻÚ}5ĵJŦEƑ!¨EƏ?íŽF
 X]vW25Ú}/ĵŵ4Ź¯ƈ#FĚƨ.F l_Tt`pM10ĵ4ŗŬÝ¶ÖĘÒ!-FƻųŢÑÔ2DGF4.ƻĔŭĺ25ďĬ.F X]vW35ĵŵ4l_Tt`pMĤÉ!ƻĵŵ4č4ƙÑ4ÇƛÚ}č2ƍ
ŋ#FĚƨ.F-ŅŐ!-Fĵŵķĉ4ųŢ5A5BÚ}4wƛ2Ś>Ə=G-EƻďĬ/!
Rpi_ďĬ104Ěƨ4ĵĬ.F X]vW45ĵŵ4čĤÉ!ƻųŢ4>ĘÒ#FĚƨ.ƻĕĵ4ÕŜ.FzŒĜďĬ'4.F e]a4ĵĚƨ5ƻďĬ¢4ƘŌ4X]vW1DX]vW24ƣ2F/ũDGF
Ø5ƻX]vW2ƥ4Ěƨ4ĵĬ5ěƎĺŔ¥2¾ƶ.FƻX]vW12Fĵ
Ĭ5¾ƶ·ƭ.F¾ƶ.G6SdmƀċBESTƀċ«ŭ21F

1ĵĬ2,-==1ƙĺ^v[ŴŎG,,FØƩƻ4C

ıĄĨ.¾ƶ.1(@2ƻX]vW24ĵĬ2,-5ƻƦDG(ØƷ!.$ƻďĬ¢4ć2ƌ+(2,-5=)ho\Rk\RX4==ĘG-FďĬ¢4ćƖ¢4ƀ

Ă25ƻX]vW14ĵĬ4¾ƶ/ƙĺƀċƇƲ.F;<Seven of the figures in this article were published in Protist, 157, Okamoto, N. & Inouye, I., Hatena
arenicola gen. et sp. nov., a Katablepharid undergoing probable plastid acquisition, 401-419,
Copyright Elsevier (2007).

0%,
x¡ 2007. ŵƴ30ä4ŮĪ­ ŵƴDžFĵĬƖ¢uºĲuĴÂ . ĊģÇÓī. ŇËà.
Kim, E. & Graham, L.2008. EEF2 analysis challenges the monophyly of Archaeplastida andChromalveolata. PLoS ONE 3: e2621.
Okamoto, N. & Inouye, I. 2005. A secondary symbiosis in progress? Science 310: 287.
Okamoto, N. & Inouye, I. 2006. Hatena arenicola gen. et sp. nov., a Katablepharid undergoingprobable plastid acquisition. Protist 157: 401-419.

H. Yamaguchi - 5