FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Wood River Trust 2. Date of Event Requiring Statement (Month/Day/Year) 05/15/2007 3. Issuer Name and Ticker or Trading Symbol PLURISTEM LIFE SYSTEMS INC [PLRS.OB] (Last) (First) (Middle) 1007 ORANGE STREET, SUITE 1410, NEMOURS BUILDING 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) WILMINGTON, DE 19801 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock, par value $0.00001 per share 100,000,000 D (1) Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Warrants (right to buy)	  (2)	05/14/2012	Common Stock	100,000,000	$ 0.025	D (1)	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Wood River Trust 1007 ORANGE STREET, SUITE 1410 NEMOURS BUILDING WILMINGTON, DE 19801	Â	  X	Â	Â
Doyle Michael C. 1007 ORANGE STREET, SUITE 1410 NEMOURS BUILDING WILMINGTON, DE 19801	Â	  X	Â	Â

Signatures

Wood River Trust By: /s/ Michael C. Doyle, Trustee		08/03/2007
**Signature of Reporting Person		Date
/s/ Michael C. Doyle		08/03/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These securities are owned directly by Wood River Trust. Michael C. Doyle is the sole Trustee of Wood River Trust and, in such capacity, may be deemed indirectly to beneficially own the securities owned by the Wood River Trust.
(2)	These Warrants provide that, with certain limited exceptions, they are not exercisable if such exercise would result in the holder beneficially owning in excess of 4.99% of the outstanding shares of common stock of the issuer on such date. As a result of such restrictions and the other securities which the reporting person may be deemed beneficially to own, as of May 15, 2007 such Warrants were not exercisable.

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